nsz Git - cparser/blob - ast2firm.c

   1 #include <config.h>
   2
   3 #define _GNU_SOURCE
   4
   5 #include <assert.h>
   6 #include <string.h>
   7 #include <stdbool.h>
   8
   9 #include <libfirm/firm.h>
  10 #include <libfirm/adt/obst.h>
  11
  12 #include "ast2firm.h"
  13
  14 #include "adt/error.h"
  15 #include "adt/array.h"
  16 #include "token_t.h"
  17 #include "type_t.h"
  18 #include "ast_t.h"
  19 #include "parser.h"
  20
  21 #define MAGIC_DEFAULT_PN_NUMBER     (long) -314159265
  22
  23 static ir_type *ir_type_const_char;
  24 static ir_type *ir_type_wchar_t;
  25 static ir_type *ir_type_void;
  26 static ir_type *ir_type_int;
  27
  28 static type_t *type_const_char;
  29 static type_t *type_void;
  30 static type_t *type_int;
  31
  32 static int       next_value_number_function;
  33 static ir_node  *continue_label;
  34 static ir_node  *break_label;
  35 static ir_node  *current_switch_cond;
  36 static bool      saw_default_label;
  37 static ir_node **imature_blocks;
  38
  39 static const declaration_t *current_function_decl;
  40 static ir_node             *current_function_name;
  41
  42 static struct obstack asm_obst;
  43
  44 typedef enum declaration_type_t {
  45         DECLARATION_TYPE_UNKNOWN,
  46         DECLARATION_TYPE_FUNCTION,
  47         DECLARATION_TYPE_GLOBAL_VARIABLE,
  48         DECLARATION_TYPE_LOCAL_VARIABLE,
  49         DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
  50         DECLARATION_TYPE_COMPOUND_MEMBER,
  51         DECLARATION_TYPE_LABEL_BLOCK,
  52         DECLARATION_TYPE_ENUM_ENTRY
  53 } declaration_type_t;
  54
  55 static ir_type *get_ir_type(type_t *type);
  56
  57 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
  58 {
  59         (void) pos;
  60 #if 0
  61         const declaration_t *declaration = & value_numbers[pos]->declaration;
  62
  63         print_warning_prefix(declaration->source_position);
  64         fprintf(stderr, "variable '%s' might be used uninitialized\n",
  65                         declaration->symbol->string);
  66 #endif
  67         fprintf(stderr, "Some variable might be used uninitialized\n");
  68         return new_r_Unknown(irg, mode);
  69 }
  70
  71 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
  72 {
  73         const source_position_t *pos = (const source_position_t*) dbg;
  74         if(pos == NULL)
  75                 return 0;
  76         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
  77                                    pos->linenr);
  78 }
  79
  80 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
  81 {
  82         const source_position_t *pos = (const source_position_t*) dbg;
  83         if(pos == NULL)
  84                 return NULL;
  85         if(line != NULL)
  86                 *line = pos->linenr;
  87         return pos->input_name;
  88 }
  89
  90 void init_ast2firm(void)
  91 {
  92         obstack_init(&asm_obst);
  93 }
  94
  95 void exit_ast2firm(void)
  96 {
  97         obstack_free(&asm_obst, NULL);
  98 }
  99
 100 static unsigned unique_id = 0;
 101
 102 static ident *unique_ident(const char *tag)
 103 {
 104         char buf[256];
 105
 106         snprintf(buf, sizeof(buf), "%s.%u", tag, unique_id);
 107         unique_id++;
 108         return new_id_from_str(buf);
 109 }
 110
 111 static ir_mode *get_atomic_mode(const atomic_type_t* atomic_type)
 112 {
 113         switch(atomic_type->atype) {
 114         case ATOMIC_TYPE_SCHAR:
 115         case ATOMIC_TYPE_CHAR:
 116                 return mode_Bs;
 117         case ATOMIC_TYPE_UCHAR:
 118                 return mode_Bu;
 119         case ATOMIC_TYPE_SHORT:
 120                 return mode_Hs;
 121         case ATOMIC_TYPE_USHORT:
 122                 return mode_Hu;
 123         case ATOMIC_TYPE_BOOL:
 124         case ATOMIC_TYPE_LONG:
 125         case ATOMIC_TYPE_INT:
 126                 return mode_Is;
 127         case ATOMIC_TYPE_ULONG:
 128         case ATOMIC_TYPE_UINT:
 129                 return mode_Iu;
 130         case ATOMIC_TYPE_LONGLONG:
 131                 return mode_Ls;
 132         case ATOMIC_TYPE_ULONGLONG:
 133                 return mode_Lu;
 134         case ATOMIC_TYPE_FLOAT:
 135                 return mode_F;
 136         case ATOMIC_TYPE_DOUBLE:
 137                 return mode_D;
 138         case ATOMIC_TYPE_LONG_DOUBLE:
 139                 return mode_E;
 140 #ifdef PROVIDE_COMPLEX
 141         case ATOMIC_TYPE_FLOAT_COMPLEX:
 142         case ATOMIC_TYPE_DOUBLE_COMPLEX:
 143         case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
 144                 panic("complex lowering not implemented yet");
 145                 break;
 146         case ATOMIC_TYPE_FLOAT_IMAGINARY:
 147         case ATOMIC_TYPE_DOUBLE_IMAGINARY:
 148         case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
 149                 panic("imaginary lowering not implemented yet");
 150                 break;
 151 #endif
 152         case ATOMIC_TYPE_VOID:
 153                 /* firm has no real void... */
 154                 return mode_Is;
 155         case ATOMIC_TYPE_INVALID:
 156                 break;
 157         }
 158         panic("Encountered unknown atomic type");
 159 }
 160
 161
 162 static unsigned get_type_size(type_t *type);
 163
 164 static unsigned get_atomic_type_size(const atomic_type_t *type)
 165 {
 166         switch(type->atype) {
 167         case ATOMIC_TYPE_CHAR:
 168         case ATOMIC_TYPE_SCHAR:
 169         case ATOMIC_TYPE_UCHAR:
 170                 return 1;
 171
 172         case ATOMIC_TYPE_SHORT:
 173         case ATOMIC_TYPE_USHORT:
 174                 return 2;
 175
 176         case ATOMIC_TYPE_BOOL:
 177         case ATOMIC_TYPE_INT:
 178         case ATOMIC_TYPE_UINT:
 179         case ATOMIC_TYPE_LONG:
 180         case ATOMIC_TYPE_ULONG:
 181         case ATOMIC_TYPE_FLOAT:
 182                 return 4;
 183
 184         case ATOMIC_TYPE_LONGLONG:
 185         case ATOMIC_TYPE_ULONGLONG:
 186         case ATOMIC_TYPE_DOUBLE:
 187                 return 8;
 188
 189         case ATOMIC_TYPE_LONG_DOUBLE:
 190                 return 12;
 191
 192         case ATOMIC_TYPE_VOID:
 193                 return 1;
 194
 195         case ATOMIC_TYPE_INVALID:
 196                 break;
 197         }
 198         panic("Trying to determine size of invalid atomic type");
 199 }
 200
 201 static unsigned get_compound_type_size(compound_type_t *type)
 202 {
 203         ir_type *irtype = get_ir_type((type_t*) type);
 204         return get_type_size_bytes(irtype);
 205 }
 206
 207 static unsigned get_array_type_size(array_type_t *type)
 208 {
 209         ir_type *irtype = get_ir_type((type_t*) type);
 210         return get_type_size_bytes(irtype);
 211 }
 212
 213 static unsigned get_type_size(type_t *type)
 214 {
 215         type = skip_typeref(type);
 216
 217         switch(type->type) {
 218         case TYPE_ATOMIC:
 219                 return get_atomic_type_size(&type->atomic);
 220         case TYPE_ENUM:
 221                 return get_mode_size_bytes(mode_Is);
 222         case TYPE_COMPOUND_UNION:
 223         case TYPE_COMPOUND_STRUCT:
 224                 return get_compound_type_size(&type->compound);
 225         case TYPE_FUNCTION:
 226                 /* just a pointer to the function */
 227                 return get_mode_size_bytes(mode_P_code);
 228         case TYPE_POINTER:
 229                 return get_mode_size_bytes(mode_P_data);
 230         case TYPE_ARRAY:
 231                 return get_array_type_size(&type->array);
 232         case TYPE_BUILTIN:
 233                 return get_type_size(type->builtin.real_type);
 234         case TYPE_TYPEDEF:
 235         case TYPE_TYPEOF:
 236         case TYPE_INVALID:
 237                 break;
 238         }
 239         panic("Trying to determine size of invalid type");
 240 }
 241
 242 static unsigned count_parameters(const function_type_t *function_type)
 243 {
 244         unsigned count = 0;
 245
 246         function_parameter_t *parameter = function_type->parameters;
 247         for ( ; parameter != NULL; parameter = parameter->next) {
 248                 ++count;
 249         }
 250
 251         return count;
 252 }
 253
 254
 255
 256
 257 static long fold_constant(const expression_t *expression);
 258
 259 static ir_type *create_atomic_type(const atomic_type_t *type)
 260 {
 261         ir_mode *mode   = get_atomic_mode(type);
 262         ident   *id     = get_mode_ident(mode);
 263         ir_type *irtype = new_type_primitive(id, mode);
 264
 265         if(type->atype == ATOMIC_TYPE_LONG_DOUBLE) {
 266                 set_type_alignment_bytes(irtype, 4);
 267         }
 268
 269         return irtype;
 270 }
 271
 272 static ir_type *create_method_type(const function_type_t *function_type)
 273 {
 274         type_t  *return_type  = function_type->return_type;
 275
 276         ident   *id           = unique_ident("functiontype");
 277         int      n_parameters = count_parameters(function_type);
 278         int      n_results    = return_type == type_void ? 0 : 1;
 279         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 280
 281         if(return_type != type_void) {
 282                 ir_type *restype = get_ir_type(return_type);
 283                 set_method_res_type(irtype, 0, restype);
 284         }
 285
 286         function_parameter_t *parameter = function_type->parameters;
 287         int                   n         = 0;
 288         for( ; parameter != NULL; parameter = parameter->next) {
 289                 ir_type *p_irtype = get_ir_type(parameter->type);
 290                 set_method_param_type(irtype, n, p_irtype);
 291                 ++n;
 292         }
 293
 294         if(function_type->variadic || function_type->unspecified_parameters) {
 295                 set_method_variadicity(irtype, variadicity_variadic);
 296         }
 297
 298         return irtype;
 299 }
 300
 301 static ir_type *create_pointer_type(pointer_type_t *type)
 302 {
 303         type_t  *points_to = type->points_to;
 304         ir_type *ir_points_to;
 305         /* Avoid endless recursion if the points_to type contains this poiner type
 306          * again (might be a struct). We therefore first create a void* pointer
 307          * and then set the real points_to type
 308          */
 309         ir_type *ir_type = new_type_pointer(unique_ident("pointer"),
 310                                             ir_type_void, mode_P_data);
 311         type->type.firm_type  = ir_type;
 312
 313         ir_points_to = get_ir_type(points_to);
 314         set_pointer_points_to_type(ir_type, ir_points_to);
 315
 316         return ir_type;
 317 }
 318
 319 static ir_type *create_array_type(array_type_t *type)
 320 {
 321         type_t  *element_type    = type->element_type;
 322         ir_type *ir_element_type = get_ir_type(element_type);
 323
 324         ident   *id      = unique_ident("array");
 325         ir_type *ir_type = new_type_array(id, 1, ir_element_type);
 326
 327         if(type->size != NULL) {
 328                 int n_elements = fold_constant(type->size);
 329
 330                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 331
 332                 size_t elemsize = get_type_size_bytes(ir_element_type);
 333                 int align = get_type_alignment_bytes(ir_element_type);
 334                 if(elemsize % align > 0) {
 335                         elemsize += align - (elemsize % align);
 336                 }
 337                 set_type_size_bytes(ir_type, n_elements * elemsize);
 338                 set_type_alignment_bytes(ir_type, align);
 339                 set_type_state(ir_type, layout_fixed);
 340         }
 341
 342         return ir_type;
 343 }
 344
 345 #define INVALID_TYPE ((ir_type_ptr)-1)
 346
 347 static ir_type *create_struct_type(compound_type_t *type)
 348 {
 349         symbol_t *symbol = type->declaration->symbol;
 350         ident    *id;
 351         if(symbol != NULL) {
 352                 id = unique_ident(symbol->string);
 353         } else {
 354                 id = unique_ident("__anonymous_struct");
 355         }
 356         ir_type *ir_type = new_type_struct(id);
 357
 358         type->type.firm_type = ir_type;
 359
 360         int align_all = 1;
 361         int offset    = 0;
 362         declaration_t *entry = type->declaration->context.declarations;
 363         for( ; entry != NULL; entry = entry->next) {
 364                 if(entry->namespc != NAMESPACE_NORMAL)
 365                         continue;
 366
 367                 ident       *ident         = new_id_from_str(entry->symbol->string);
 368                 ir_type_ptr  entry_ir_type = get_ir_type(entry->type);
 369
 370                 int entry_size      = get_type_size_bytes(entry_ir_type);
 371                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 372                 int misalign        = offset % entry_alignment;
 373                 if (misalign != 0)
 374                         offset += entry_alignment - misalign;
 375
 376                 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
 377                 set_entity_offset(entity, offset);
 378                 add_struct_member(ir_type, entity);
 379                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 380                 entry->v.entity         = entity;
 381
 382                 offset += entry_size;
 383                 if(entry_alignment > align_all) {
 384                         if(entry_alignment % align_all != 0) {
 385                                 panic("Uneven alignments not supported yet");
 386                         }
 387                         align_all = entry_alignment;
 388                 }
 389         }
 390
 391         int misalign = offset % align_all;
 392         offset += misalign;
 393         set_type_alignment_bytes(ir_type, align_all);
 394         set_type_size_bytes(ir_type, offset);
 395         set_type_state(ir_type, layout_fixed);
 396
 397         return ir_type;
 398 }
 399
 400 static ir_type *create_union_type(compound_type_t *type)
 401 {
 402         declaration_t *declaration = type->declaration;
 403         symbol_t      *symbol      = declaration->symbol;
 404         ident         *id;
 405         if(symbol != NULL) {
 406                 id = unique_ident(symbol->string);
 407         } else {
 408                 id = unique_ident("__anonymous_union");
 409         }
 410         ir_type  *ir_type = new_type_union(id);
 411
 412         type->type.firm_type = ir_type;
 413
 414         int align_all = 1;
 415         int size      = 0;
 416         declaration_t *entry = declaration->context.declarations;
 417         for( ; entry != NULL; entry = entry->next) {
 418                 if(entry->namespc != NAMESPACE_NORMAL)
 419                         continue;
 420
 421                 ident       *ident         = new_id_from_str(entry->symbol->string);
 422                 ir_type_ptr  entry_ir_type = get_ir_type(entry->type);
 423
 424                 int entry_size      = get_type_size_bytes(entry_ir_type);
 425                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 426
 427                 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
 428                 add_union_member(ir_type, entity);
 429                 set_entity_offset(entity, 0);
 430                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 431                 entry->v.entity         = entity;
 432
 433                 if(entry_size > size) {
 434                         size = entry_size;
 435                 }
 436                 if(entry_alignment > align_all) {
 437                         if(entry_alignment % align_all != 0) {
 438                                 panic("Uneven alignments not supported yet");
 439                         }
 440                         align_all = entry_alignment;
 441                 }
 442         }
 443
 444         set_type_alignment_bytes(ir_type, align_all);
 445         set_type_size_bytes(ir_type, size);
 446         set_type_state(ir_type, layout_fixed);
 447
 448         return ir_type;
 449 }
 450
 451 static ir_node *expression_to_firm(const expression_t *expression);
 452 static inline ir_mode *get_ir_mode(type_t *type);
 453
 454 static ir_type *create_enum_type(enum_type_t *const type)
 455 {
 456         type->type.firm_type = ir_type_int;
 457
 458         ir_mode *const mode    = get_ir_mode((type_t*) type);
 459         tarval  *const one     = get_mode_one(mode);
 460         tarval  *      tv_next = get_tarval_null(mode);
 461
 462         declaration_t *declaration = type->declaration->next;
 463         for (; declaration != NULL; declaration = declaration->next) {
 464                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY)
 465                         break;
 466
 467                 declaration->declaration_type = DECLARATION_TYPE_ENUM_ENTRY;
 468
 469                 expression_t *const init = declaration->init.enum_value;
 470                 if (init != NULL) {
 471                         ir_node *const cnst = expression_to_firm(init);
 472                         if (!is_Const(cnst)) {
 473                                 panic("couldn't fold constant");
 474                         }
 475                         tv_next = get_Const_tarval(cnst);
 476                 }
 477                 declaration->v.enum_val = tv_next;
 478                 tv_next = tarval_add(tv_next, one);
 479         }
 480
 481         return ir_type_int;
 482 }
 483
 484 static ir_type *get_ir_type(type_t *type)
 485 {
 486         assert(type != NULL);
 487
 488         type = skip_typeref(type);
 489
 490         if(type->base.firm_type != NULL) {
 491                 assert(type->base.firm_type != INVALID_TYPE);
 492                 return type->base.firm_type;
 493         }
 494
 495         ir_type *firm_type = NULL;
 496         switch(type->type) {
 497         case TYPE_ATOMIC:
 498                 firm_type = create_atomic_type(&type->atomic);
 499                 break;
 500         case TYPE_FUNCTION:
 501                 firm_type = create_method_type(&type->function);
 502                 break;
 503         case TYPE_POINTER:
 504                 firm_type = create_pointer_type(&type->pointer);
 505                 break;
 506         case TYPE_ARRAY:
 507                 firm_type = create_array_type(&type->array);
 508                 break;
 509         case TYPE_COMPOUND_STRUCT:
 510                 firm_type = create_struct_type(&type->compound);
 511                 break;
 512         case TYPE_COMPOUND_UNION:
 513                 firm_type = create_union_type(&type->compound);
 514                 break;
 515         case TYPE_ENUM:
 516                 firm_type = create_enum_type(&type->enumt);
 517                 break;
 518         case TYPE_BUILTIN:
 519                 firm_type = get_ir_type(type->builtin.real_type);
 520                 break;
 521         case TYPE_TYPEOF:
 522         case TYPE_TYPEDEF:
 523         case TYPE_INVALID:
 524                 break;
 525         }
 526         if(firm_type == NULL)
 527                 panic("unknown type found");
 528
 529         type->base.firm_type = firm_type;
 530         return firm_type;
 531 }
 532
 533 static inline ir_mode *get_ir_mode(type_t *type)
 534 {
 535         ir_type *irtype = get_ir_type(type);
 536
 537         /* firm doesn't report a mode for arrays somehow... */
 538         if(is_Array_type(irtype)) {
 539                 return mode_P;
 540         }
 541
 542         ir_mode *mode = get_type_mode(irtype);
 543         assert(mode != NULL);
 544         return mode;
 545 }
 546
 547 static ir_entity* get_function_entity(declaration_t *declaration)
 548 {
 549         if(declaration->declaration_type == DECLARATION_TYPE_FUNCTION)
 550                 return declaration->v.entity;
 551         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
 552
 553         symbol_t *symbol = declaration->symbol;
 554         ident    *id     = new_id_from_str(symbol->string);
 555
 556         ir_type  *global_type    = get_glob_type();
 557         ir_type  *ir_type_method = get_ir_type(declaration->type);
 558         assert(is_Method_type(ir_type_method));
 559
 560         ir_entity *entity = new_entity(global_type, id, ir_type_method);
 561         set_entity_ld_ident(entity, id);
 562         if(declaration->storage_class == STORAGE_CLASS_STATIC
 563                         || declaration->is_inline) {
 564                 set_entity_visibility(entity, visibility_local);
 565         } else if(declaration->init.statement != NULL) {
 566                 set_entity_visibility(entity, visibility_external_visible);
 567         } else {
 568                 set_entity_visibility(entity, visibility_external_allocated);
 569         }
 570         set_entity_allocation(entity, allocation_static);
 571
 572         declaration->declaration_type = DECLARATION_TYPE_FUNCTION;
 573         declaration->v.entity         = entity;
 574
 575         return entity;
 576 }
 577
 578 static dbg_info *get_dbg_info(const source_position_t *pos)
 579 {
 580         return (dbg_info*) pos;
 581 }
 582
 583 static ir_node *const_to_firm(const const_expression_t *cnst)
 584 {
 585         dbg_info *dbgi = get_dbg_info(&cnst->expression.source_position);
 586         ir_mode  *mode = get_ir_mode(cnst->expression.datatype);
 587
 588         char    buf[128];
 589         tarval *tv;
 590         size_t  len;
 591         if(mode_is_float(mode)) {
 592                 tv = new_tarval_from_double(cnst->v.float_value, mode);
 593         } else {
 594                 if(mode_is_signed(mode)) {
 595                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
 596                 } else {
 597                         len = snprintf(buf, sizeof(buf), "%llu",
 598                                        (unsigned long long) cnst->v.int_value);
 599                 }
 600                 tv = new_tarval_from_str(buf, len, mode);
 601         }
 602
 603         return new_d_Const(dbgi, mode, tv);
 604 }
 605
 606 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
 607 {
 608         assert(entity != NULL);
 609         union symconst_symbol sym;
 610         sym.entity_p = entity;
 611         return new_d_SymConst(dbgi, sym, symconst_addr_ent);
 612 }
 613
 614 static ir_node *string_to_firm(const source_position_t *const src_pos,
 615                                const char *const id_prefix,
 616                                const char *const string)
 617 {
 618         ir_type *const global_type = get_glob_type();
 619         ir_type *const type        = new_type_array(unique_ident("strtype"), 1,
 620                                                     ir_type_const_char);
 621
 622         ident     *const id     = unique_ident(id_prefix);
 623         ir_entity *const entity = new_entity(global_type, id, type);
 624         set_entity_ld_ident(entity, id);
 625         set_entity_variability(entity, variability_constant);
 626         set_entity_allocation(entity, allocation_static);
 627
 628         ir_type *const elem_type = ir_type_const_char;
 629         ir_mode *const mode      = get_type_mode(elem_type);
 630
 631         const size_t slen = strlen(string) + 1;
 632
 633         set_array_lower_bound_int(type, 0, 0);
 634         set_array_upper_bound_int(type, 0, slen);
 635         set_type_size_bytes(type, slen);
 636         set_type_state(type, layout_fixed);
 637
 638         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
 639         for(size_t i = 0; i < slen; ++i) {
 640                 tvs[i] = new_tarval_from_long(string[i], mode);
 641         }
 642
 643         set_array_entity_values(entity, tvs, slen);
 644         free(tvs);
 645
 646         dbg_info *const dbgi = get_dbg_info(src_pos);
 647
 648         return create_symconst(dbgi, entity);
 649 }
 650
 651 static ir_node *string_literal_to_firm(
 652                 const string_literal_expression_t* literal)
 653 {
 654         return string_to_firm(&literal->expression.source_position, "Lstr",
 655                               literal->value);
 656 }
 657
 658 static ir_node *wide_string_literal_to_firm(
 659         const wide_string_literal_expression_t* const literal)
 660 {
 661         ir_type *const global_type = get_glob_type();
 662         ir_type *const elem_type   = ir_type_wchar_t;
 663         ir_type *const type        = new_type_array(unique_ident("strtype"), 1,
 664                                                     elem_type);
 665
 666         ident     *const id     = unique_ident("Lstr");
 667         ir_entity *const entity = new_entity(global_type, id, type);
 668         set_entity_ld_ident(entity, id);
 669         set_entity_variability(entity, variability_constant);
 670         set_entity_allocation(entity, allocation_static);
 671
 672         ir_mode *const mode      = get_type_mode(elem_type);
 673
 674         const wchar_rep_t *const string = literal->value.begin;
 675         const size_t             slen   = literal->value.size;
 676
 677         set_array_lower_bound_int(type, 0, 0);
 678         set_array_upper_bound_int(type, 0, slen);
 679         set_type_size_bytes(type, slen);
 680         set_type_state(type, layout_fixed);
 681
 682         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
 683         for(size_t i = 0; i < slen; ++i) {
 684                 tvs[i] = new_tarval_from_long(string[i], mode);
 685         }
 686
 687         set_array_entity_values(entity, tvs, slen);
 688         free(tvs);
 689
 690         dbg_info *const dbgi = get_dbg_info(&literal->expression.source_position);
 691
 692         return create_symconst(dbgi, entity);
 693 }
 694
 695 static ir_node *deref_address(ir_type *const irtype, ir_node *const addr,
 696                               dbg_info *const dbgi)
 697 {
 698         if(is_compound_type(irtype) || is_Array_type(irtype)) {
 699                 return addr;
 700         }
 701
 702         ir_mode *const mode     = get_type_mode(irtype);
 703         ir_node *const memory   = get_store();
 704         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
 705         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
 706         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
 707         set_store(load_mem);
 708         return load_res;
 709 }
 710
 711 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
 712 {
 713         ir_mode *mode = get_irn_mode(node);
 714
 715         if(!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
 716                 return node;
 717         if(!mode_is_float(mode))
 718                 return node;
 719
 720         /* check if there is already a Conv */
 721         if (get_irn_op(node) == op_Conv) {
 722                 /* convert it into a strict Conv */
 723                 set_Conv_strict(node, 1);
 724                 return node;
 725         }
 726
 727         /* otherwise create a new one */
 728         return new_d_strictConv(dbgi, node, mode);
 729 }
 730
 731 static ir_node *get_global_var_address(dbg_info *const dbgi,
 732                                        const declaration_t *const decl)
 733 {
 734         assert(decl->declaration_type == DECLARATION_TYPE_GLOBAL_VARIABLE);
 735
 736         ir_entity *const entity = decl->v.entity;
 737         switch ((storage_class_tag_t)decl->storage_class) {
 738                 case STORAGE_CLASS_THREAD:
 739                 case STORAGE_CLASS_THREAD_EXTERN:
 740                 case STORAGE_CLASS_THREAD_STATIC: {
 741                         ir_node *const no_mem = new_NoMem();
 742                         ir_node *const tls    = get_irg_tls(current_ir_graph);
 743                         return new_d_simpleSel(dbgi, no_mem, tls, entity);
 744                 }
 745
 746                 default:
 747                         return create_symconst(dbgi, entity);
 748         }
 749 }
 750
 751 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
 752 {
 753         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 754         declaration_t *declaration = ref->declaration;
 755         type_t        *type        = skip_typeref(declaration->type);
 756
 757         switch((declaration_type_t) declaration->declaration_type) {
 758         case DECLARATION_TYPE_UNKNOWN:
 759                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY) {
 760                         break;
 761                 }
 762                 get_ir_type(type);
 763                 /* FALLTHROUGH */
 764
 765         case DECLARATION_TYPE_ENUM_ENTRY: {
 766                 ir_mode *const mode = get_ir_mode(type);
 767                 return new_Const(mode, declaration->v.enum_val);
 768         }
 769
 770         case DECLARATION_TYPE_LOCAL_VARIABLE: {
 771                 ir_mode *mode = get_ir_mode(type);
 772                 return get_value(declaration->v.value_number, mode);
 773         }
 774         case DECLARATION_TYPE_FUNCTION: {
 775                 return create_symconst(dbgi, declaration->v.entity);
 776         }
 777         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
 778                 ir_node *const addr   = get_global_var_address(dbgi, declaration);
 779                 ir_type *const irtype = get_entity_type(declaration->v.entity);
 780                 return deref_address(irtype, addr, dbgi);
 781         }
 782
 783         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY: {
 784                 ir_entity *entity = declaration->v.entity;
 785                 ir_node   *frame  = get_irg_frame(current_ir_graph);
 786                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
 787                 ir_type   *irtype = get_entity_type(entity);
 788                 return deref_address(irtype, sel, dbgi);
 789         }
 790
 791         case DECLARATION_TYPE_COMPOUND_MEMBER:
 792         case DECLARATION_TYPE_LABEL_BLOCK:
 793                 panic("not implemented reference type");
 794         }
 795
 796         panic("reference to declaration with unknown type found");
 797 }
 798
 799 static ir_node *reference_addr(const reference_expression_t *ref)
 800 {
 801         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 802         declaration_t *declaration = ref->declaration;
 803
 804         switch((declaration_type_t) declaration->declaration_type) {
 805         case DECLARATION_TYPE_UNKNOWN:
 806                 break;
 807         case DECLARATION_TYPE_LOCAL_VARIABLE:
 808                 panic("local variable without entity has no address");
 809         case DECLARATION_TYPE_FUNCTION: {
 810                 return create_symconst(dbgi, declaration->v.entity);
 811         }
 812         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
 813                 ir_node *const addr = get_global_var_address(dbgi, declaration);
 814                 return addr;
 815         }
 816         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY: {
 817                 ir_entity *entity = declaration->v.entity;
 818                 ir_node   *frame  = get_irg_frame(current_ir_graph);
 819                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
 820
 821                 return sel;
 822         }
 823
 824         case DECLARATION_TYPE_ENUM_ENTRY:
 825                 panic("trying to reference enum entry");
 826
 827         case DECLARATION_TYPE_COMPOUND_MEMBER:
 828         case DECLARATION_TYPE_LABEL_BLOCK:
 829                 panic("not implemented reference type");
 830         }
 831
 832         panic("reference to declaration with unknown type found");
 833 }
 834
 835 static ir_node *process_builtin_call(const call_expression_t *call)
 836 {
 837         dbg_info *dbgi = get_dbg_info(&call->expression.source_position);
 838
 839         assert(call->function->type == EXPR_BUILTIN_SYMBOL);
 840         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
 841
 842         type_t *type = skip_typeref(builtin->expression.datatype);
 843         assert(is_type_pointer(type));
 844
 845         type_t   *function_type = skip_typeref(type->pointer.points_to);
 846         symbol_t *symbol        = builtin->symbol;
 847
 848         switch(symbol->ID) {
 849         case T___builtin_alloca: {
 850                 if(call->arguments == NULL || call->arguments->next != NULL) {
 851                         panic("invalid number of parameters on __builtin_alloca");
 852                 }
 853                 expression_t *argument = call->arguments->expression;
 854                 ir_node      *size     = expression_to_firm(argument);
 855
 856                 ir_node *store  = get_store();
 857                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
 858                                               stack_alloc);
 859                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
 860                 set_store(proj_m);
 861                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
 862
 863                 return res;
 864         }
 865         case T___builtin_nan:
 866         case T___builtin_nanf:
 867         case T___builtin_nand: {
 868                 /* Ignore string for now... */
 869                 assert(is_type_function(function_type));
 870                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
 871                 tarval  *tv   = get_mode_NAN(mode);
 872                 ir_node *res  = new_d_Const(dbgi, mode, tv);
 873                 return res;
 874         }
 875         case T___builtin_va_end:
 876                 return NULL;
 877         default:
 878                 panic("Unsupported builtin found\n");
 879         }
 880 }
 881
 882 static ir_node *call_expression_to_firm(const call_expression_t *call)
 883 {
 884         assert(get_cur_block() != NULL);
 885
 886         expression_t *function = call->function;
 887         if(function->type == EXPR_BUILTIN_SYMBOL) {
 888                 return process_builtin_call(call);
 889         }
 890         ir_node *callee = expression_to_firm(function);
 891
 892         type_t *type = skip_typeref(function->base.datatype);
 893         assert(is_type_pointer(type));
 894         pointer_type_t *pointer_type = &type->pointer;
 895         type_t         *points_to    = skip_typeref(pointer_type->points_to);
 896         assert(is_type_function(points_to));
 897         function_type_t *function_type = &points_to->function;
 898
 899         int              n_parameters = 0;
 900         call_argument_t *argument     = call->arguments;
 901         for( ; argument != NULL; argument = argument->next) {
 902                 ++n_parameters;
 903         }
 904
 905         dbg_info *dbgi  = get_dbg_info(&call->expression.source_position);
 906
 907         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
 908         ir_type *new_method_type = NULL;
 909         if(function_type->variadic || function_type->unspecified_parameters) {
 910                 /* we need to construct a new method type matching the call
 911                  * arguments... */
 912                 int n_res       = get_method_n_ress(ir_method_type);
 913                 new_method_type = new_type_method(unique_ident("calltype"),
 914                                                   n_parameters, n_res);
 915                 set_method_calling_convention(new_method_type,
 916                                get_method_calling_convention(ir_method_type));
 917                 set_method_additional_properties(new_method_type,
 918                                get_method_additional_properties(ir_method_type));
 919
 920                 for(int i = 0; i < n_res; ++i) {
 921                         set_method_res_type(new_method_type, i,
 922                                             get_method_res_type(ir_method_type, i));
 923                 }
 924         }
 925         ir_node *in[n_parameters];
 926
 927         argument = call->arguments;
 928         int n = 0;
 929         for( ; argument != NULL; argument = argument->next) {
 930                 expression_t *expression = argument->expression;
 931                 ir_node      *arg_node   = expression_to_firm(expression);
 932
 933                 arg_node = do_strict_conv(dbgi, arg_node);
 934
 935                 in[n] = arg_node;
 936                 if(new_method_type != NULL) {
 937                         ir_type *irtype = get_ir_type(expression->base.datatype);
 938                         set_method_param_type(new_method_type, n, irtype);
 939                 }
 940
 941                 n++;
 942         }
 943         assert(n == n_parameters);
 944
 945         if(new_method_type != NULL)
 946                 ir_method_type = new_method_type;
 947
 948         ir_node  *store = get_store();
 949         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
 950                                      ir_method_type);
 951         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
 952         set_store(mem);
 953
 954         type_t  *return_type = skip_typeref(function_type->return_type);
 955         ir_node *result      = NULL;
 956
 957         if(!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
 958                 ir_mode *mode;
 959                 if(is_type_scalar(return_type)) {
 960                         mode = get_ir_mode(return_type);
 961                 } else {
 962                         mode = mode_P_data;
 963                 }
 964                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
 965                 result           = new_d_Proj(dbgi, resproj, mode, 0);
 966         }
 967
 968         return result;
 969 }
 970
 971 static void statement_to_firm(statement_t *statement);
 972 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
 973
 974 static ir_node *expression_to_addr(const expression_t *expression);
 975 static void create_condition_evaluation(const expression_t *expression,
 976                                         ir_node *true_block,
 977                                         ir_node *false_block);
 978
 979 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
 980                          ir_node *value)
 981 {
 982         value = do_strict_conv(dbgi, value);
 983
 984         ir_node  *memory = get_store();
 985
 986         if(is_type_scalar(type)) {
 987                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
 988                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
 989                 set_store(store_mem);
 990         } else {
 991                 ir_type *irtype    = get_ir_type(type);
 992                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
 993                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
 994                 set_store(copyb_mem);
 995         }
 996 }
 997
 998 static void set_value_for_expression(const expression_t *expression,
 999                                      ir_node *value)
1000 {
1001         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1002         value          = do_strict_conv(dbgi, value);
1003
1004         if(expression->type == EXPR_REFERENCE) {
1005                 reference_expression_t *ref = (reference_expression_t*) expression;
1006
1007                 declaration_t *declaration = ref->declaration;
1008                 assert(declaration->declaration_type != DECLARATION_TYPE_UNKNOWN);
1009                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
1010                         set_value(declaration->v.value_number, value);
1011                         return;
1012                 }
1013         }
1014
1015         ir_node *addr = expression_to_addr(expression);
1016         type_t  *type = skip_typeref(expression->base.datatype);
1017         assign_value(dbgi, addr, type, value);
1018 }
1019
1020 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1021 {
1022         ir_mode *value_mode = get_irn_mode(value);
1023
1024         if (value_mode == dest_mode || is_Bad(value))
1025                 return value;
1026
1027         if(dest_mode == mode_b) {
1028                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
1029                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1030                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1031                 return proj;
1032         }
1033
1034         return new_d_Conv(dbgi, value, dest_mode);
1035 }
1036
1037 static ir_node *create_incdec(const unary_expression_t *expression)
1038 {
1039         dbg_info     *dbgi  = get_dbg_info(&expression->expression.source_position);
1040         type_t       *type  = skip_typeref(expression->expression.datatype);
1041         ir_mode      *mode  = get_ir_mode(type);
1042         expression_t *value = expression->value;
1043
1044         ir_node *value_node = expression_to_firm(value);
1045
1046         ir_node *offset;
1047         if(is_type_pointer(type)) {
1048                 pointer_type_t *pointer_type = &type->pointer;
1049                 unsigned        elem_size    = get_type_size(pointer_type->points_to);
1050                 offset = new_Const_long(mode_Is, elem_size);
1051         } else {
1052                 assert(is_type_arithmetic(type));
1053                 offset = new_Const(mode, get_mode_one(mode));
1054         }
1055
1056         switch(expression->expression.type) {
1057         case EXPR_UNARY_POSTFIX_INCREMENT: {
1058                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
1059                 set_value_for_expression(value, new_value);
1060                 return value_node;
1061         }
1062         case EXPR_UNARY_POSTFIX_DECREMENT: {
1063                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
1064                 set_value_for_expression(value, new_value);
1065                 return value_node;
1066         }
1067         case EXPR_UNARY_PREFIX_INCREMENT: {
1068                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
1069                 set_value_for_expression(value, new_value);
1070                 return new_value;
1071         }
1072         case EXPR_UNARY_PREFIX_DECREMENT: {
1073                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
1074                 set_value_for_expression(value, new_value);
1075                 return new_value;
1076         }
1077         default:
1078                 panic("no incdec expr in create_incdec");
1079                 return NULL;
1080         }
1081 }
1082
1083 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
1084 {
1085         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1086         type_t   *type = skip_typeref(expression->expression.datatype);
1087
1088         if(expression->expression.type == EXPR_UNARY_TAKE_ADDRESS)
1089                 return expression_to_addr(expression->value);
1090
1091         const expression_t *value      = expression->value;
1092         ir_node            *value_node = expression_to_firm(value);
1093
1094         switch(expression->expression.type) {
1095         case EXPR_UNARY_NEGATE: {
1096                 ir_mode *mode = get_ir_mode(type);
1097                 return new_d_Minus(dbgi, value_node, mode);
1098         }
1099         case EXPR_UNARY_PLUS:
1100                 return value_node;
1101         case EXPR_UNARY_BITWISE_NEGATE: {
1102                 ir_mode *mode = get_ir_mode(type);
1103                 return new_d_Not(dbgi, value_node, mode);
1104         }
1105         case EXPR_UNARY_NOT: {
1106                 ir_mode *mode = get_ir_mode(type);
1107                 if(get_irn_mode(value_node) != mode_b) {
1108                         value_node = create_conv(dbgi, value_node, mode_b);
1109                 }
1110                 value_node = new_d_Not(dbgi, value_node, mode_b);
1111                 if(mode != mode_b) {
1112                         value_node = create_conv(dbgi, value_node, mode);
1113                 }
1114                 return value_node;
1115         }
1116         case EXPR_UNARY_DEREFERENCE: {
1117                 type_t  *value_type = skip_typeref(value->base.datatype);
1118                 ir_type *irtype     = get_ir_type(value_type);
1119                 assert(is_Pointer_type(irtype));
1120                 ir_type *points_to  = get_pointer_points_to_type(irtype);
1121                 return deref_address(points_to, value_node, dbgi);
1122         }
1123         case EXPR_UNARY_POSTFIX_INCREMENT:
1124         case EXPR_UNARY_POSTFIX_DECREMENT:
1125         case EXPR_UNARY_PREFIX_INCREMENT:
1126         case EXPR_UNARY_PREFIX_DECREMENT:
1127                 return create_incdec(expression);
1128         case EXPR_UNARY_CAST: {
1129                 ir_mode *mode = get_ir_mode(type);
1130                 ir_node *node = create_conv(dbgi, value_node, mode);
1131                 node = do_strict_conv(dbgi, node);
1132                 return node;
1133         }
1134         case EXPR_UNARY_CAST_IMPLICIT: {
1135                 ir_mode *mode = get_ir_mode(type);
1136                 return create_conv(dbgi, value_node, mode);
1137         }
1138
1139         default:
1140                 break;
1141         }
1142         panic("invalid UNEXPR type found");
1143 }
1144
1145 static long get_pnc(const expression_type_t type)
1146 {
1147         switch(type) {
1148         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
1149         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
1150         case EXPR_BINARY_NOTEQUAL:      return pn_Cmp_Ne;
1151         case EXPR_BINARY_ISLESS:
1152         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
1153         case EXPR_BINARY_ISLESSEQUAL:
1154         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
1155         case EXPR_BINARY_ISGREATER:
1156         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
1157         case EXPR_BINARY_ISGREATEREQUAL:
1158         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
1159         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
1160
1161         default:
1162                 break;
1163         }
1164         panic("trying to get pn_Cmp from non-comparison binexpr type");
1165 }
1166
1167 static ir_node *create_lazy_op(const binary_expression_t *expression)
1168 {
1169         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1170         type_t   *type = expression->expression.datatype;
1171         ir_mode  *mode = get_ir_mode(type);
1172
1173         ir_node *cur_block = get_cur_block();
1174
1175         ir_node *one_block = new_immBlock();
1176         ir_node *one       = new_Const(mode, get_mode_one(mode));
1177         ir_node *jmp_one   = new_d_Jmp(dbgi);
1178
1179         ir_node *zero_block = new_immBlock();
1180         ir_node *zero       = new_Const(mode, get_mode_null(mode));
1181         ir_node *jmp_zero   = new_d_Jmp(dbgi);
1182
1183         set_cur_block(cur_block);
1184         create_condition_evaluation((const expression_t*) expression,
1185                                     one_block, zero_block);
1186         mature_immBlock(one_block);
1187         mature_immBlock(zero_block);
1188
1189         ir_node *common_block = new_immBlock();
1190         add_immBlock_pred(common_block, jmp_one);
1191         add_immBlock_pred(common_block, jmp_zero);
1192         mature_immBlock(common_block);
1193
1194         ir_node *in[2] = { one, zero };
1195         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1196
1197         return val;
1198 }
1199
1200 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
1201                                             ir_node *right, ir_mode *mode);
1202
1203 static ir_node *create_arithmetic_binop(const binary_expression_t *expression,
1204                                         create_arithmetic_func func)
1205 {
1206         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1207         ir_node  *left  = expression_to_firm(expression->left);
1208         ir_node  *right = expression_to_firm(expression->right);
1209         type_t   *type  = expression->right->base.datatype;
1210         /* be careful with the modes, because in arithmetic assign nodes only
1211          * the right operand has the mode of the arithmetic already */
1212         ir_mode  *mode  = get_ir_mode(type);
1213         left            = create_conv(dbgi, left, mode);
1214         ir_node  *res   = func(dbgi, left, right, mode);
1215
1216         return res;
1217 }
1218
1219 static ir_node *pointer_arithmetic(ir_node  *const pointer,
1220                                    ir_node  *      integer,
1221                                    type_t   *const type,
1222                                    dbg_info *const dbgi,
1223                                    const create_arithmetic_func func)
1224 {
1225         pointer_type_t *const pointer_type = (pointer_type_t*)type;
1226         type_t         *const points_to    = pointer_type->points_to;
1227         const unsigned        elem_size    = get_type_size(points_to);
1228
1229         assert(elem_size >= 1);
1230         if (elem_size > 1) {
1231                 integer             = create_conv(dbgi, integer, mode_Is);
1232                 ir_node *const cnst = new_Const_long(mode_Is, (long)elem_size);
1233                 ir_node *const mul  = new_d_Mul(dbgi, integer, cnst, mode_Is);
1234                 integer = mul;
1235         }
1236
1237         ir_mode *const mode = get_ir_mode(type);
1238         return func(dbgi, pointer, integer, mode);
1239 }
1240
1241 static ir_node *create_arithmetic_assign_binop(
1242                 const binary_expression_t *expression, create_arithmetic_func func)
1243 {
1244         dbg_info *const dbgi = get_dbg_info(&expression->expression.source_position);
1245         type_t   *const type = skip_typeref(expression->expression.datatype);
1246         ir_node  *value;
1247
1248         if (is_type_pointer(type)) {
1249                 ir_node        *const pointer = expression_to_firm(expression->left);
1250                 ir_node        *      integer = expression_to_firm(expression->right);
1251                 value = pointer_arithmetic(pointer, integer, type, dbgi, func);
1252         } else {
1253                 value = create_arithmetic_binop(expression, func);
1254         }
1255
1256         ir_mode  *const mode = get_ir_mode(type);
1257         value = create_conv(dbgi, value, mode);
1258         set_value_for_expression(expression->left, value);
1259
1260         return value;
1261 }
1262
1263 static ir_node *create_add(const binary_expression_t *expression)
1264 {
1265         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1266         ir_node  *left  = expression_to_firm(expression->left);
1267         ir_node  *right = expression_to_firm(expression->right);
1268         type_t   *type  = expression->expression.datatype;
1269
1270         expression_t *expr_left  = expression->left;
1271         expression_t *expr_right = expression->right;
1272         type_t       *type_left  = skip_typeref(expr_left->base.datatype);
1273         type_t       *type_right = skip_typeref(expr_right->base.datatype);
1274
1275         if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
1276                 ir_mode *const mode = get_ir_mode(type);
1277                 return new_d_Add(dbgi, left, right, mode);
1278         }
1279
1280         if (is_type_pointer(type_left)) {
1281                 return pointer_arithmetic(left, right, type, dbgi, new_d_Add);
1282         } else {
1283                 assert(is_type_pointer(type_right));
1284                 return pointer_arithmetic(right, left, type, dbgi, new_d_Add);
1285         }
1286 }
1287
1288 static ir_node *create_sub(const binary_expression_t *expression)
1289 {
1290         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1291         expression_t *const expr_left  = expression->left;
1292         expression_t *const expr_right = expression->right;
1293         ir_node      *const left       = expression_to_firm(expr_left);
1294         ir_node      *const right      = expression_to_firm(expr_right);
1295         type_t       *const type       = expression->expression.datatype;
1296         type_t       *const type_left  = skip_typeref(expr_left->base.datatype);
1297         type_t       *const type_right = skip_typeref(expr_right->base.datatype);
1298
1299         if (is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
1300                 ir_mode *const mode = get_ir_mode(type);
1301                 return new_d_Sub(dbgi, left, right, mode);
1302         } else if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
1303                 const pointer_type_t *const ptr_type = &type_left->pointer;
1304                 const unsigned elem_size             = get_type_size(ptr_type->points_to);
1305                 ir_mode *const mode   = get_ir_mode(type);
1306                 ir_node *const sub    = new_d_Sub(dbgi, left, right, mode);
1307                 ir_node *const cnst   = new_Const_long(mode_Is, (long)elem_size);
1308                 ir_node *const no_mem = new_NoMem();
1309                 ir_node *const div    = new_d_Div(dbgi, no_mem, sub, cnst, mode,
1310                                                   op_pin_state_floats);
1311                 return new_d_Proj(dbgi, div, mode, pn_Div_res);
1312         }
1313
1314         assert(is_type_pointer(type_left));
1315         return pointer_arithmetic(left, right, type_left, dbgi, new_d_Sub);
1316 }
1317
1318 static ir_node *create_shift(const binary_expression_t *expression)
1319 {
1320         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1321         ir_node  *left  = expression_to_firm(expression->left);
1322         ir_node  *right = expression_to_firm(expression->right);
1323         type_t   *type  = expression->expression.datatype;
1324         ir_mode  *mode  = get_ir_mode(type);
1325
1326         /* firm always wants the shift count to be unsigned */
1327         right = create_conv(dbgi, right, mode_Iu);
1328
1329         ir_node *res;
1330
1331         switch(expression->expression.type) {
1332         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
1333         case EXPR_BINARY_SHIFTLEFT:
1334                 res = new_d_Shl(dbgi, left, right, mode);
1335                 break;
1336         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
1337         case EXPR_BINARY_SHIFTRIGHT: {
1338                  expression_t *expr_left = expression->left;
1339                  type_t       *type_left = skip_typeref(expr_left->base.datatype);
1340
1341                  if(is_type_signed(type_left)) {
1342                         res = new_d_Shrs(dbgi, left, right, mode);
1343                  } else {
1344                          res = new_d_Shr(dbgi, left, right, mode);
1345                  }
1346                  break;
1347         }
1348         default:
1349                 panic("create shift op called for non-shift op");
1350         }
1351
1352         return res;
1353 }
1354
1355
1356 static ir_node *create_divmod(const binary_expression_t *expression)
1357 {
1358         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1359         ir_node  *left  = expression_to_firm(expression->left);
1360         ir_node  *right = expression_to_firm(expression->right);
1361         ir_node  *pin   = new_Pin(new_NoMem());
1362         /* be careful with the modes, because in arithmetic assign nodes only
1363          * the right operand has the mode of the arithmetic already */
1364         type_t   *type  = expression->right->base.datatype;
1365         ir_mode  *mode  = get_ir_mode(type);
1366         left            = create_conv(dbgi, left, mode);
1367         ir_node  *op;
1368         ir_node  *res;
1369
1370         switch (expression->expression.type) {
1371         case EXPR_BINARY_DIV:
1372         case EXPR_BINARY_DIV_ASSIGN:
1373                 if(mode_is_float(mode)) {
1374                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
1375                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
1376                 } else {
1377                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
1378                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
1379                 }
1380                 break;
1381
1382         case EXPR_BINARY_MOD:
1383         case EXPR_BINARY_MOD_ASSIGN:
1384                 assert(!mode_is_float(mode));
1385                 op  = new_d_Mod(dbgi, pin, left, right, mode, op_pin_state_floats);
1386                 res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
1387                 break;
1388
1389         default: panic("unexpected binary expression type in create_divmod()");
1390         }
1391
1392         return res;
1393 }
1394
1395 static ir_node *create_arithmetic_assign_divmod(
1396                 const binary_expression_t *expression)
1397 {
1398         ir_node  *      value = create_divmod(expression);
1399         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1400         type_t   *const type  = expression->expression.datatype;
1401         ir_mode  *const mode  = get_ir_mode(type);
1402
1403         assert(type->type != TYPE_POINTER);
1404
1405         value = create_conv(dbgi, value, mode);
1406         set_value_for_expression(expression->left, value);
1407
1408         return value;
1409 }
1410
1411 static ir_node *create_arithmetic_assign_shift(
1412                 const binary_expression_t *expression)
1413 {
1414         ir_node  *      value = create_shift(expression);
1415         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1416         type_t   *const type  = expression->expression.datatype;
1417         ir_mode  *const mode  = get_ir_mode(type);
1418
1419         value = create_conv(dbgi, value, mode);
1420         set_value_for_expression(expression->left, value);
1421
1422         return value;
1423 }
1424
1425 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
1426 {
1427         expression_type_t type = expression->expression.type;
1428
1429         switch(type) {
1430         case EXPR_BINARY_EQUAL:
1431         case EXPR_BINARY_NOTEQUAL:
1432         case EXPR_BINARY_LESS:
1433         case EXPR_BINARY_LESSEQUAL:
1434         case EXPR_BINARY_GREATER:
1435         case EXPR_BINARY_GREATEREQUAL:
1436         case EXPR_BINARY_ISGREATER:
1437         case EXPR_BINARY_ISGREATEREQUAL:
1438         case EXPR_BINARY_ISLESS:
1439         case EXPR_BINARY_ISLESSEQUAL:
1440         case EXPR_BINARY_ISLESSGREATER:
1441         case EXPR_BINARY_ISUNORDERED: {
1442                 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1443                 ir_node *left  = expression_to_firm(expression->left);
1444                 ir_node *right = expression_to_firm(expression->right);
1445                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
1446                 long     pnc   = get_pnc(type);
1447                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
1448                 return proj;
1449         }
1450         case EXPR_BINARY_ASSIGN: {
1451                 ir_node *right = expression_to_firm(expression->right);
1452                 set_value_for_expression(expression->left, right);
1453
1454                 return right;
1455         }
1456         case EXPR_BINARY_ADD:
1457                 return create_add(expression);
1458         case EXPR_BINARY_SUB:
1459                 return create_sub(expression);
1460         case EXPR_BINARY_MUL:
1461                 return create_arithmetic_binop(expression, new_d_Mul);
1462         case EXPR_BINARY_BITWISE_AND:
1463                 return create_arithmetic_binop(expression, new_d_And);
1464         case EXPR_BINARY_BITWISE_OR:
1465                 return create_arithmetic_binop(expression, new_d_Or);
1466         case EXPR_BINARY_BITWISE_XOR:
1467                 return create_arithmetic_binop(expression, new_d_Eor);
1468         case EXPR_BINARY_SHIFTLEFT:
1469         case EXPR_BINARY_SHIFTRIGHT:
1470                 return create_shift(expression);
1471         case EXPR_BINARY_DIV:
1472         case EXPR_BINARY_MOD:
1473                 return create_divmod(expression);
1474         case EXPR_BINARY_LOGICAL_AND:
1475         case EXPR_BINARY_LOGICAL_OR:
1476                 return create_lazy_op(expression);
1477         case EXPR_BINARY_COMMA:
1478                 expression_to_firm(expression->left);
1479                 return expression_to_firm(expression->right);
1480         case EXPR_BINARY_ADD_ASSIGN:
1481                 return create_arithmetic_assign_binop(expression, new_d_Add);
1482         case EXPR_BINARY_SUB_ASSIGN:
1483                 return create_arithmetic_assign_binop(expression, new_d_Sub);
1484         case EXPR_BINARY_MUL_ASSIGN:
1485                 return create_arithmetic_assign_binop(expression, new_d_Mul);
1486         case EXPR_BINARY_DIV_ASSIGN:
1487                 return create_arithmetic_assign_divmod(expression);
1488         case EXPR_BINARY_BITWISE_AND_ASSIGN:
1489                 return create_arithmetic_assign_binop(expression, new_d_And);
1490         case EXPR_BINARY_BITWISE_OR_ASSIGN:
1491                 return create_arithmetic_assign_binop(expression, new_d_Or);
1492         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
1493                 return create_arithmetic_assign_binop(expression, new_d_Eor);
1494         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
1495         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
1496                 return create_arithmetic_assign_shift(expression);
1497         default:
1498                 panic("TODO binexpr type");
1499         }
1500 }
1501
1502 static ir_node *array_access_addr(const array_access_expression_t *expression)
1503 {
1504         dbg_info *dbgi      = get_dbg_info(&expression->expression.source_position);
1505         ir_node  *base_addr = expression_to_firm(expression->array_ref);
1506         ir_node  *offset    = expression_to_firm(expression->index);
1507         offset              = create_conv(dbgi, offset, mode_Iu);
1508
1509         type_t *ref_type = skip_typeref(expression->array_ref->base.datatype);
1510         assert(is_type_pointer(ref_type));
1511         pointer_type_t *pointer_type = (pointer_type_t*) ref_type;
1512
1513         unsigned elem_size       = get_type_size(pointer_type->points_to);
1514         ir_node *elem_size_const = new_Const_long(mode_Iu, elem_size);
1515         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
1516                                              mode_Iu);
1517         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P);
1518
1519         return result;
1520 }
1521
1522 static ir_node *array_access_to_firm(
1523                 const array_access_expression_t *expression)
1524 {
1525         dbg_info *dbgi   = get_dbg_info(&expression->expression.source_position);
1526         ir_node  *addr   = array_access_addr(expression);
1527         type_t   *type   = revert_automatic_type_conversion(
1528                         (const expression_t*) expression);
1529         type             = skip_typeref(type);
1530         ir_type  *irtype = get_ir_type(type);
1531
1532         return deref_address(irtype, addr, dbgi);
1533 }
1534
1535 static ir_node *sizeof_to_firm(const sizeof_expression_t *expression)
1536 {
1537         type_t *type = expression->type;
1538         if(type == NULL) {
1539                 type = expression->size_expression->base.datatype;
1540                 assert(type != NULL);
1541         }
1542
1543         ir_mode  *mode      = get_ir_mode(expression->expression.datatype);
1544         unsigned  size      = get_type_size(type);
1545         ir_node  *size_node = new_Const_long(mode, size);
1546
1547         return size_node;
1548 }
1549
1550 static tarval *try_fold_constant(const expression_t *expression)
1551 {
1552         ir_graph *old_current_ir_graph = current_ir_graph;
1553         if(current_ir_graph == NULL) {
1554                 current_ir_graph = get_const_code_irg();
1555         }
1556
1557         ir_node *cnst = expression_to_firm(expression);
1558         current_ir_graph = old_current_ir_graph;
1559
1560         if(!is_Const(cnst)) {
1561                 return NULL;
1562         }
1563
1564         tarval *tv = get_Const_tarval(cnst);
1565         if(!tarval_is_long(tv)) {
1566                 return NULL;
1567         }
1568
1569         return tv;
1570 }
1571
1572 static long fold_constant(const expression_t *expression)
1573 {
1574         tarval *tv = try_fold_constant(expression);
1575         if(tv == NULL) {
1576                 panic("couldn't fold constantl");
1577         }
1578
1579         return get_tarval_long(tv);
1580 }
1581
1582 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
1583 {
1584         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1585
1586         /* first try to fold a constant condition */
1587         tarval *tv = try_fold_constant(expression->condition);
1588         if(tv != NULL) {
1589                 long val = get_tarval_long(tv);
1590                 if(val) {
1591                         return expression_to_firm(expression->true_expression);
1592                 } else {
1593                         return expression_to_firm(expression->false_expression);
1594                 }
1595         }
1596
1597         ir_node *cur_block   = get_cur_block();
1598
1599         /* create the true block */
1600         ir_node *true_block  = new_immBlock();
1601
1602         ir_node *true_val = expression_to_firm(expression->true_expression);
1603         ir_node *true_jmp = new_Jmp();
1604
1605         /* create the false block */
1606         ir_node *false_block = new_immBlock();
1607
1608         ir_node *false_val = expression_to_firm(expression->false_expression);
1609         ir_node *false_jmp = new_Jmp();
1610
1611         /* create the condition evaluation */
1612         set_cur_block(cur_block);
1613         create_condition_evaluation(expression->condition, true_block, false_block);
1614         mature_immBlock(true_block);
1615         mature_immBlock(false_block);
1616
1617         /* create the common block */
1618         ir_node *common_block = new_immBlock();
1619         add_immBlock_pred(common_block, true_jmp);
1620         add_immBlock_pred(common_block, false_jmp);
1621         mature_immBlock(common_block);
1622
1623         /* TODO improve static semantics, so either both or no values are NULL */
1624         if (true_val == NULL || false_val == NULL)
1625                 return NULL;
1626
1627         ir_node *in[2] = { true_val, false_val };
1628         ir_mode *mode  = get_irn_mode(true_val);
1629         assert(get_irn_mode(false_val) == mode);
1630         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1631
1632         return val;
1633 }
1634
1635 static ir_node *select_addr(const select_expression_t *expression)
1636 {
1637         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1638
1639         ir_node *compound_addr = expression_to_firm(expression->compound);
1640
1641         declaration_t *entry = expression->compound_entry;
1642         assert(entry->declaration_type == DECLARATION_TYPE_COMPOUND_MEMBER);
1643         ir_entity     *entity = entry->v.entity;
1644
1645         assert(entity != NULL);
1646
1647         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
1648
1649         return sel;
1650 }
1651
1652 static ir_node *select_to_firm(const select_expression_t *expression)
1653 {
1654         dbg_info *dbgi   = get_dbg_info(&expression->expression.source_position);
1655         ir_node  *addr   = select_addr(expression);
1656         type_t   *type   = revert_automatic_type_conversion(
1657                         (const expression_t*) expression);
1658         type             = skip_typeref(type);
1659         ir_type  *irtype = get_ir_type(type);
1660
1661         return deref_address(irtype, addr, dbgi);
1662 }
1663
1664 /* Values returned by __builtin_classify_type. */
1665 typedef enum gcc_type_class
1666 {
1667         no_type_class = -1,
1668         void_type_class,
1669         integer_type_class,
1670         char_type_class,
1671         enumeral_type_class,
1672         boolean_type_class,
1673         pointer_type_class,
1674         reference_type_class,
1675         offset_type_class,
1676         real_type_class,
1677         complex_type_class,
1678         function_type_class,
1679         method_type_class,
1680         record_type_class,
1681         union_type_class,
1682         array_type_class,
1683         string_type_class,
1684         set_type_class,
1685         file_type_class,
1686         lang_type_class
1687 } gcc_type_class;
1688
1689 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
1690 {
1691         const type_t *const type = expr->type_expression->base.datatype;
1692
1693         gcc_type_class tc;
1694         switch (type->type)
1695         {
1696                 case TYPE_ATOMIC: {
1697                         const atomic_type_t *const atomic_type = &type->atomic;
1698                         switch (atomic_type->atype) {
1699                                 // should not be reached
1700                                 case ATOMIC_TYPE_INVALID:
1701                                         tc = no_type_class;
1702                                         break;
1703
1704                                 // gcc cannot do that
1705                                 case ATOMIC_TYPE_VOID:
1706                                         tc = void_type_class;
1707                                         break;
1708
1709                                 case ATOMIC_TYPE_CHAR:      // gcc handles this as integer
1710                                 case ATOMIC_TYPE_SCHAR:     // gcc handles this as integer
1711                                 case ATOMIC_TYPE_UCHAR:     // gcc handles this as integer
1712                                 case ATOMIC_TYPE_SHORT:
1713                                 case ATOMIC_TYPE_USHORT:
1714                                 case ATOMIC_TYPE_INT:
1715                                 case ATOMIC_TYPE_UINT:
1716                                 case ATOMIC_TYPE_LONG:
1717                                 case ATOMIC_TYPE_ULONG:
1718                                 case ATOMIC_TYPE_LONGLONG:
1719                                 case ATOMIC_TYPE_ULONGLONG:
1720                                 case ATOMIC_TYPE_BOOL:      // gcc handles this as integer
1721                                         tc = integer_type_class;
1722                                         break;
1723
1724                                 case ATOMIC_TYPE_FLOAT:
1725                                 case ATOMIC_TYPE_DOUBLE:
1726                                 case ATOMIC_TYPE_LONG_DOUBLE:
1727                                         tc = real_type_class;
1728                                         break;
1729
1730 #ifdef PROVIDE_COMPLEX
1731                                 case ATOMIC_TYPE_FLOAT_COMPLEX:
1732                                 case ATOMIC_TYPE_DOUBLE_COMPLEX:
1733                                 case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
1734                                         tc = complex_type_class;
1735                                         break;
1736                                 case ATOMIC_TYPE_FLOAT_IMAGINARY:
1737                                 case ATOMIC_TYPE_DOUBLE_IMAGINARY:
1738                                 case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
1739                                         tc = complex_type_class;
1740                                         break;
1741 #endif
1742
1743                                 default:
1744                                         panic("Unimplemented case in classify_type_to_firm().");
1745                         }
1746                         break;
1747                 }
1748
1749                 case TYPE_ARRAY:           // gcc handles this as pointer
1750                 case TYPE_FUNCTION:        // gcc handles this as pointer
1751                 case TYPE_POINTER:         tc = pointer_type_class; break;
1752                 case TYPE_COMPOUND_STRUCT: tc = record_type_class;  break;
1753                 case TYPE_COMPOUND_UNION:  tc = union_type_class;   break;
1754
1755                 // gcc handles this as integer
1756                 case TYPE_ENUM:            tc = integer_type_class; break;
1757
1758                 default:
1759                         panic("Unimplemented case in classify_type_to_firm().");
1760         }
1761
1762         dbg_info *const dbgi = get_dbg_info(&expr->expression.source_position);
1763         ir_mode  *const mode = mode_Is;
1764         tarval   *const tv   = new_tarval_from_long(tc, mode);
1765         return new_d_Const(dbgi, mode, tv);
1766 }
1767
1768 static ir_node *function_name_to_firm(
1769                 const string_literal_expression_t *const expr)
1770 {
1771         if (current_function_name == NULL) {
1772                 const source_position_t *const src_pos =
1773                         &expr->expression.source_position;
1774                 const char *const name = current_function_decl->symbol->string;
1775                 current_function_name = string_to_firm(src_pos, "__func__", name);
1776         }
1777
1778         return current_function_name;
1779 }
1780
1781 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
1782 {
1783         statement_t *statement = expr->statement;
1784
1785         assert(statement->type == STATEMENT_COMPOUND);
1786         return compound_statement_to_firm((compound_statement_t*) statement);
1787 }
1788
1789 static ir_node *va_start_expression_to_firm(
1790         const va_start_expression_t *const expr)
1791 {
1792         ir_type   *const method_type = get_ir_type(current_function_decl->type);
1793         int        const n           = get_method_n_params(method_type) - 1;
1794         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
1795         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
1796         dbg_info  *const dbgi        =
1797                 get_dbg_info(&expr->expression.source_position);
1798         ir_node   *const no_mem      = new_NoMem();
1799         ir_node   *const arg_sel     =
1800                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
1801
1802         size_t     const parm_size   = get_type_size(expr->parameter->type);
1803         ir_node   *const cnst        = new_Const_long(mode_Iu, parm_size);
1804         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
1805         set_value_for_expression(expr->ap, add);
1806
1807         return NULL;
1808 }
1809
1810 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
1811 {
1812         ir_type  *const irtype = get_ir_type(expr->expression.datatype);
1813         ir_node  *const ap     = expression_to_firm(expr->ap);
1814         dbg_info *const dbgi   = get_dbg_info(&expr->expression.source_position);
1815         ir_node  *const res    = deref_address(irtype, ap, dbgi);
1816
1817         size_t     const parm_size   = get_type_size(expr->expression.datatype);
1818         ir_node   *const cnst        = new_Const_long(mode_Iu, parm_size);
1819         ir_node   *const add         = new_d_Add(dbgi, ap, cnst, mode_P_data);
1820         set_value_for_expression(expr->ap, add);
1821
1822         return res;
1823 }
1824
1825 static ir_node *dereference_addr(const unary_expression_t *const expression)
1826 {
1827         assert(expression->expression.type == EXPR_UNARY_DEREFERENCE);
1828         return expression_to_firm(expression->value);
1829 }
1830
1831 static ir_node *expression_to_addr(const expression_t *expression)
1832 {
1833         switch(expression->type) {
1834         case EXPR_REFERENCE:
1835                 return reference_addr(&expression->reference);
1836         case EXPR_ARRAY_ACCESS:
1837                 return array_access_addr(&expression->array_access);
1838         case EXPR_SELECT:
1839                 return select_addr(&expression->select);
1840         case EXPR_CALL:
1841                 return call_expression_to_firm(&expression->call);
1842         case EXPR_UNARY_DEREFERENCE: {
1843                 return dereference_addr(&expression->unary);
1844         }
1845         default:
1846                 break;
1847         }
1848         panic("trying to get address of non-lvalue");
1849 }
1850
1851 static ir_node *_expression_to_firm(const expression_t *expression)
1852 {
1853         switch(expression->type) {
1854         case EXPR_CONST:
1855                 return const_to_firm(&expression->conste);
1856         case EXPR_STRING_LITERAL:
1857                 return string_literal_to_firm(&expression->string);
1858         case EXPR_WIDE_STRING_LITERAL:
1859                 return wide_string_literal_to_firm(&expression->wide_string);
1860         case EXPR_REFERENCE:
1861                 return reference_expression_to_firm(&expression->reference);
1862         case EXPR_CALL:
1863                 return call_expression_to_firm(&expression->call);
1864         EXPR_UNARY_CASES
1865                 return unary_expression_to_firm(&expression->unary);
1866         EXPR_BINARY_CASES
1867                 return binary_expression_to_firm(&expression->binary);
1868         case EXPR_ARRAY_ACCESS:
1869                 return array_access_to_firm(&expression->array_access);
1870         case EXPR_SIZEOF:
1871                 return sizeof_to_firm(&expression->sizeofe);
1872         case EXPR_CONDITIONAL:
1873                 return conditional_to_firm(&expression->conditional);
1874         case EXPR_SELECT:
1875                 return select_to_firm(&expression->select);
1876         case EXPR_CLASSIFY_TYPE:
1877                 return classify_type_to_firm(&expression->classify_type);
1878         case EXPR_FUNCTION:
1879         case EXPR_PRETTY_FUNCTION:
1880                 return function_name_to_firm(&expression->string);
1881         case EXPR_STATEMENT:
1882                 return statement_expression_to_firm(&expression->statement);
1883         case EXPR_VA_START:
1884                 return va_start_expression_to_firm(&expression->va_starte);
1885         case EXPR_VA_ARG:
1886                 return va_arg_expression_to_firm(&expression->va_arge);
1887         case EXPR_OFFSETOF:
1888         case EXPR_BUILTIN_SYMBOL:
1889                 panic("unimplemented expression found");
1890
1891         case EXPR_UNKNOWN:
1892         case EXPR_INVALID:
1893                 break;
1894         }
1895         panic("invalid expression found");
1896 }
1897
1898 static ir_node *expression_to_firm(const expression_t *expression)
1899 {
1900         ir_node *res = _expression_to_firm(expression);
1901
1902         if(res != NULL && get_irn_mode(res) == mode_b) {
1903                 ir_mode *mode = get_ir_mode(expression->base.datatype);
1904                 res           = create_conv(NULL, res, mode);
1905         }
1906
1907         return res;
1908 }
1909
1910 static ir_node *expression_to_modeb(const expression_t *expression)
1911 {
1912         ir_node *res = _expression_to_firm(expression);
1913         res          = create_conv(NULL, res, mode_b);
1914
1915         return res;
1916 }
1917
1918 /**
1919  * create a short-circuit expression evaluation that tries to construct
1920  * efficient control flow structures for &&, || and ! expressions
1921  */
1922 static void create_condition_evaluation(const expression_t *expression,
1923                                         ir_node *true_block,
1924                                         ir_node *false_block)
1925 {
1926         switch(expression->type) {
1927         case EXPR_UNARY_NOT: {
1928                 const unary_expression_t *unary_expression = &expression->unary;
1929                 create_condition_evaluation(unary_expression->value, false_block,
1930                                             true_block);
1931                 return;
1932         }
1933         case EXPR_BINARY_LOGICAL_AND: {
1934                 const binary_expression_t *binary_expression = &expression->binary;
1935
1936                 ir_node *cur_block   = get_cur_block();
1937                 ir_node *extra_block = new_immBlock();
1938                 set_cur_block(cur_block);
1939                 create_condition_evaluation(binary_expression->left, extra_block,
1940                                             false_block);
1941                 mature_immBlock(extra_block);
1942                 set_cur_block(extra_block);
1943                 create_condition_evaluation(binary_expression->right, true_block,
1944                                             false_block);
1945                 return;
1946         }
1947         case EXPR_BINARY_LOGICAL_OR: {
1948                 const binary_expression_t *binary_expression = &expression->binary;
1949
1950                 ir_node *cur_block   = get_cur_block();
1951                 ir_node *extra_block = new_immBlock();
1952                 set_cur_block(cur_block);
1953                 create_condition_evaluation(binary_expression->left, true_block,
1954                                             extra_block);
1955                 mature_immBlock(extra_block);
1956                 set_cur_block(extra_block);
1957                 create_condition_evaluation(binary_expression->right, true_block,
1958                                             false_block);
1959                 return;
1960         }
1961         default:
1962                 break;
1963         }
1964
1965         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
1966         ir_node  *condition  = expression_to_modeb(expression);
1967         ir_node  *cond       = new_d_Cond(dbgi, condition);
1968         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1969         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1970
1971         add_immBlock_pred(true_block, true_proj);
1972         add_immBlock_pred(false_block, false_proj);
1973
1974         set_cur_block(NULL);
1975 }
1976
1977
1978
1979 static void create_declaration_entity(declaration_t *declaration,
1980                                       declaration_type_t declaration_type,
1981                                       ir_type *parent_type)
1982 {
1983         ident     *id     = new_id_from_str(declaration->symbol->string);
1984         ir_type   *irtype = get_ir_type(declaration->type);
1985         ir_entity *entity = new_entity(parent_type, id, irtype);
1986         set_entity_ld_ident(entity, id);
1987
1988         declaration->declaration_type = (unsigned char) declaration_type;
1989         declaration->v.entity         = entity;
1990         set_entity_variability(entity, variability_uninitialized);
1991         if(parent_type == get_tls_type())
1992                 set_entity_allocation(entity, allocation_automatic);
1993         else if(declaration_type == DECLARATION_TYPE_GLOBAL_VARIABLE)
1994                 set_entity_allocation(entity, allocation_static);
1995         /* TODO: visibility? */
1996 }
1997
1998 typedef struct compound_graph_path_entry_t compound_graph_path_entry_t;
1999
2000 enum compound_graph_entry_type_t {
2001         COMPOUND_GRAPH_ENTRY_ARRAY,
2002         COMPOUND_GRAPH_ENTRY_COMPOUND
2003 };
2004
2005 struct compound_graph_path_entry_t {
2006         int type;
2007         union {
2008                 ir_entity *entity;
2009                 int        array_index;
2010         } v;
2011         compound_graph_path_entry_t *prev;
2012 };
2013
2014 static void create_initializer_object(initializer_t *initializer, type_t *type,
2015                 ir_entity *entity, compound_graph_path_entry_t *entry, int len);
2016
2017 static compound_graph_path *create_compound_path(ir_type *type,
2018                 compound_graph_path_entry_t *entry, int len)
2019 {
2020         compound_graph_path *path = new_compound_graph_path(type, len);
2021
2022         int i = len - 1;
2023         for( ; entry != NULL; entry = entry->prev, --i) {
2024                 assert(i >= 0);
2025                 if(entry->type == COMPOUND_GRAPH_ENTRY_COMPOUND) {
2026                         set_compound_graph_path_node(path, i, entry->v.entity);
2027                 } else {
2028                         assert(entry->type == COMPOUND_GRAPH_ENTRY_ARRAY);
2029                         set_compound_graph_path_array_index(path, i, entry->v.array_index);
2030                 }
2031         }
2032         assert(i == -1);
2033
2034         return path;
2035 }
2036
2037 static void create_initializer_value(initializer_value_t *initializer,
2038                                      ir_entity *entity,
2039                                      compound_graph_path_entry_t *entry,
2040                                      int len)
2041 {
2042         ir_node             *node = expression_to_firm(initializer->value);
2043         ir_type             *type = get_entity_type(entity);
2044         compound_graph_path *path = create_compound_path(type, entry, len);
2045         add_compound_ent_value_w_path(entity, node, path);
2046 }
2047
2048 static void create_initializer_compound(initializer_list_t *initializer,
2049                                         compound_type_t *type,
2050                                         ir_entity *entity,
2051                                         compound_graph_path_entry_t *last_entry,
2052                                         int len)
2053 {
2054         declaration_t *compound_declaration = type->declaration;
2055
2056         declaration_t *compound_entry = compound_declaration->context.declarations;
2057
2058         compound_graph_path_entry_t entry;
2059         entry.type = COMPOUND_GRAPH_ENTRY_COMPOUND;
2060         entry.prev = last_entry;
2061         ++len;
2062
2063         size_t i = 0;
2064         for( ; compound_entry != NULL; compound_entry = compound_entry->next) {
2065                 if(compound_entry->symbol == NULL)
2066                         continue;
2067                 if(compound_entry->namespc != NAMESPACE_NORMAL)
2068                         continue;
2069
2070                 if(i >= initializer->len)
2071                         break;
2072
2073                 entry.v.entity = compound_entry->v.entity;
2074
2075                 initializer_t *sub_initializer = initializer->initializers[i];
2076
2077                 assert(compound_entry != NULL);
2078                 assert(compound_entry->declaration_type
2079                                 == DECLARATION_TYPE_COMPOUND_MEMBER);
2080
2081                 if(sub_initializer->type == INITIALIZER_VALUE) {
2082                         create_initializer_value(&sub_initializer->value,
2083                                                  entity, &entry, len);
2084                 } else {
2085                         type_t *entry_type = skip_typeref(compound_entry->type);
2086                         create_initializer_object(sub_initializer, entry_type, entity,
2087                                                   &entry, len);
2088                 }
2089
2090                 ++i;
2091         }
2092 }
2093
2094 static void create_initializer_array(initializer_list_t *initializer,
2095                                      array_type_t *type, ir_entity *entity,
2096                                      compound_graph_path_entry_t *last_entry,
2097                                      int len)
2098 {
2099         type_t *element_type = type->element_type;
2100         element_type         = skip_typeref(element_type);
2101
2102         compound_graph_path_entry_t entry;
2103         entry.type = COMPOUND_GRAPH_ENTRY_ARRAY;
2104         entry.prev = last_entry;
2105         ++len;
2106
2107         size_t i;
2108         for(i = 0; i < initializer->len; ++i) {
2109                 entry.v.array_index = i;
2110
2111                 initializer_t *sub_initializer = initializer->initializers[i];
2112
2113                 if(sub_initializer->type == INITIALIZER_VALUE) {
2114                         create_initializer_value(&sub_initializer->value,
2115                                                  entity, &entry, len);
2116                 } else {
2117                         create_initializer_object(sub_initializer, element_type, entity,
2118                                                   &entry, len);
2119                 }
2120         }
2121
2122 #if 0
2123         /* TODO: initialize rest... */
2124         if(type->size_expression != NULL) {
2125                 size_t array_len = fold_constant(type->size_expression);
2126                 for( ; i < array_len; ++i) {
2127
2128                 }
2129         }
2130 #endif
2131 }
2132
2133 static void create_initializer_string(initializer_string_t *initializer,
2134                                       array_type_t *type, ir_entity *entity,
2135                                       compound_graph_path_entry_t *last_entry,
2136                                       int len)
2137 {
2138         type_t *element_type = type->element_type;
2139         element_type         = skip_typeref(element_type);
2140
2141         compound_graph_path_entry_t entry;
2142         entry.type = COMPOUND_GRAPH_ENTRY_ARRAY;
2143         entry.prev = last_entry;
2144         ++len;
2145
2146         ir_type    *irtype  = get_entity_type(entity);
2147         size_t      arr_len = get_array_type_size(type);
2148         const char *p       = initializer->string;
2149         size_t      i       = 0;
2150         for(i = 0; i < arr_len; ++i, ++p) {
2151                 entry.v.array_index = i;
2152
2153                 ir_node             *node = new_Const_long(mode_Bs, *p);
2154                 compound_graph_path *path = create_compound_path(irtype, &entry, len);
2155                 add_compound_ent_value_w_path(entity, node, path);
2156
2157                 if(*p == '\0')
2158                         break;
2159         }
2160 }
2161
2162 static void create_initializer_wide_string(
2163         const initializer_wide_string_t *const initializer, array_type_t *const type,
2164         ir_entity *const entity, compound_graph_path_entry_t *const last_entry,
2165         int len)
2166 {
2167         type_t *element_type = type->element_type;
2168         element_type         = skip_typeref(element_type);
2169
2170         compound_graph_path_entry_t entry;
2171         entry.type = COMPOUND_GRAPH_ENTRY_ARRAY;
2172         entry.prev = last_entry;
2173         ++len;
2174
2175         ir_type           *const irtype  = get_entity_type(entity);
2176         const size_t             arr_len = get_array_type_size(type);
2177         const wchar_rep_t *      p       = initializer->string.begin;
2178         const wchar_rep_t *const end     = p + initializer->string.size;
2179         for (size_t i = 0; i < arr_len && p != end; ++i, ++p) {
2180                 entry.v.array_index = i;
2181
2182                 ir_node             *node = new_Const_long(mode_Is, *p);
2183                 compound_graph_path *path = create_compound_path(irtype, &entry, len);
2184                 add_compound_ent_value_w_path(entity, node, path);
2185         }
2186 }
2187
2188 static void create_initializer_object(initializer_t *initializer, type_t *type,
2189                 ir_entity *entity, compound_graph_path_entry_t *entry, int len)
2190 {
2191         if(is_type_array(type)) {
2192                 array_type_t *array_type = &type->array;
2193
2194                 switch (initializer->type) {
2195                         case INITIALIZER_STRING: {
2196                                 initializer_string_t *const string = &initializer->string;
2197                                 create_initializer_string(string, array_type, entity, entry, len);
2198                                 return;
2199                         }
2200
2201                         case INITIALIZER_WIDE_STRING: {
2202                                 initializer_wide_string_t *const string = &initializer->wide_string;
2203                                 create_initializer_wide_string(string, array_type, entity, entry, len);
2204                                 return;
2205                         }
2206
2207                         case INITIALIZER_LIST: {
2208                                 initializer_list_t *const list = &initializer->list;
2209                                 create_initializer_array(list, array_type, entity, entry, len);
2210                                 return;
2211                         }
2212
2213                         case INITIALIZER_VALUE:
2214                                 break;
2215                 }
2216                 panic("Unhandled initializer");
2217         } else {
2218                 assert(initializer->type == INITIALIZER_LIST);
2219                 initializer_list_t *list = &initializer->list;
2220
2221                 assert(is_type_compound(type));
2222                 compound_type_t *compound_type = &type->compound;
2223                 create_initializer_compound(list, compound_type, entity, entry, len);
2224         }
2225 }
2226
2227 static void create_initializer_local_variable_entity(declaration_t *declaration)
2228 {
2229         initializer_t *initializer = declaration->init.initializer;
2230         dbg_info      *dbgi        = get_dbg_info(&declaration->source_position);
2231         ir_entity     *entity      = declaration->v.entity;
2232         ir_node       *memory      = get_store();
2233         ir_node       *nomem       = new_NoMem();
2234         ir_node       *frame       = get_irg_frame(current_ir_graph);
2235         ir_node       *addr        = new_d_simpleSel(dbgi, nomem, frame, entity);
2236
2237         if(initializer->type == INITIALIZER_VALUE) {
2238                 initializer_value_t *initializer_value = &initializer->value;
2239
2240                 ir_node *value = expression_to_firm(initializer_value->value);
2241                 type_t  *type  = skip_typeref(declaration->type);
2242                 assign_value(dbgi, addr, type, value);
2243                 return;
2244         }
2245
2246         /* create a "template" entity which is copied to the entity on the stack */
2247         ident     *id          = unique_ident("initializer");
2248         ir_type   *irtype      = get_ir_type(declaration->type);
2249         ir_type   *global_type = get_glob_type();
2250         ir_entity *init_entity = new_entity(global_type, id, irtype);
2251         set_entity_ld_ident(init_entity, id);
2252
2253         set_entity_variability(init_entity, variability_initialized);
2254         set_entity_visibility(init_entity, visibility_local);
2255         set_entity_allocation(init_entity, allocation_static);
2256
2257         ir_graph *old_current_ir_graph = current_ir_graph;
2258         current_ir_graph = get_const_code_irg();
2259
2260         type_t *type = skip_typeref(declaration->type);
2261         create_initializer_object(initializer, type, init_entity, NULL, 0);
2262
2263         assert(current_ir_graph == get_const_code_irg());
2264         current_ir_graph = old_current_ir_graph;
2265
2266         ir_node *src_addr  = create_symconst(dbgi, init_entity);
2267         ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
2268
2269         ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
2270         set_store(copyb_mem);
2271 }
2272
2273 static void create_initializer(declaration_t *declaration)
2274 {
2275         initializer_t *initializer = declaration->init.initializer;
2276         if(initializer == NULL)
2277                 return;
2278
2279         declaration_type_t declaration_type
2280                 = (declaration_type_t) declaration->declaration_type;
2281         if(declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY) {
2282                 create_initializer_local_variable_entity(declaration);
2283                 return;
2284         }
2285
2286         if(initializer->type == INITIALIZER_VALUE) {
2287                 initializer_value_t *initializer_value = &initializer->value;
2288
2289                 ir_node *value = expression_to_firm(initializer_value->value);
2290
2291                 if(declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
2292                         set_value(declaration->v.value_number, value);
2293                 } else {
2294                         assert(declaration_type == DECLARATION_TYPE_GLOBAL_VARIABLE);
2295
2296                         ir_entity *entity = declaration->v.entity;
2297
2298                         set_entity_variability(entity, variability_initialized);
2299                         set_atomic_ent_value(entity, value);
2300                 }
2301         } else {
2302                 assert(declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY
2303                                 || declaration_type == DECLARATION_TYPE_GLOBAL_VARIABLE);
2304
2305                 ir_entity *entity = declaration->v.entity;
2306                 set_entity_variability(entity, variability_initialized);
2307
2308                 type_t *type = skip_typeref(declaration->type);
2309                 create_initializer_object(initializer, type, entity, NULL, 0);
2310         }
2311 }
2312
2313 static void create_local_variable(declaration_t *declaration)
2314 {
2315         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
2316
2317         bool needs_entity = declaration->address_taken;
2318         type_t *type = skip_typeref(declaration->type);
2319
2320         if(is_type_array(type) || is_type_compound(type)) {
2321                 needs_entity = true;
2322         }
2323
2324         if(needs_entity) {
2325                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2326                 create_declaration_entity(declaration,
2327                                           DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
2328                                           frame_type);
2329         } else {
2330                 declaration->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
2331                 declaration->v.value_number   = next_value_number_function;
2332                 ++next_value_number_function;
2333         }
2334
2335         create_initializer(declaration);
2336 }
2337
2338 static void create_local_static_variable(declaration_t *declaration)
2339 {
2340         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
2341
2342         type_t    *type        = skip_typeref(declaration->type);
2343         ir_type   *global_type = get_glob_type();
2344         ident     *id          = unique_ident(declaration->symbol->string);
2345         ir_type   *irtype      = get_ir_type(type);
2346         ir_entity *entity      = new_entity(global_type, id, irtype);
2347         set_entity_ld_ident(entity, id);
2348
2349         declaration->declaration_type = DECLARATION_TYPE_GLOBAL_VARIABLE;
2350         declaration->v.entity         = entity;
2351         set_entity_variability(entity, variability_uninitialized);
2352         set_entity_visibility(entity, visibility_local);
2353         set_entity_allocation(entity, allocation_static);
2354
2355         ir_graph *old_current_ir_graph = current_ir_graph;
2356         current_ir_graph = get_const_code_irg();
2357
2358         create_initializer(declaration);
2359
2360         assert(current_ir_graph == get_const_code_irg());
2361         current_ir_graph = old_current_ir_graph;
2362 }
2363
2364
2365
2366 static void return_statement_to_firm(return_statement_t *statement)
2367 {
2368         if(get_cur_block() == NULL)
2369                 return;
2370
2371         ir_type *func_irtype = get_ir_type(current_function_decl->type);
2372
2373         dbg_info *dbgi  = get_dbg_info(&statement->statement.source_position);
2374
2375         ir_node *in[1];
2376         int      in_len;
2377         if(get_method_n_ress(func_irtype) > 0) {
2378                 ir_type *res_type = get_method_res_type(func_irtype, 0);
2379
2380                 if(statement->return_value != NULL) {
2381                         ir_node *node = expression_to_firm(statement->return_value);
2382                         node  = do_strict_conv(dbgi, node);
2383                         in[0] = node;
2384                 } else {
2385                         ir_mode *mode;
2386                         if(is_compound_type(res_type)) {
2387                                 mode = mode_P_data;
2388                         } else {
2389                                 mode = get_type_mode(res_type);
2390                         }
2391                         in[0] = new_Unknown(mode);
2392                 }
2393                 in_len = 1;
2394         } else {
2395                 /* build return_value for its side effects */
2396                 if(statement->return_value != NULL) {
2397                         expression_to_firm(statement->return_value);
2398                 }
2399                 in_len = 0;
2400         }
2401
2402         ir_node  *store = get_store();
2403         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
2404
2405         ir_node *end_block = get_irg_end_block(current_ir_graph);
2406         add_immBlock_pred(end_block, ret);
2407
2408         set_cur_block(NULL);
2409 }
2410
2411 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
2412 {
2413         if(get_cur_block() == NULL)
2414                 return NULL;
2415
2416         return expression_to_firm(statement->expression);
2417 }
2418
2419 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
2420 {
2421         ir_node     *result    = NULL;
2422         statement_t *statement = compound->statements;
2423         for( ; statement != NULL; statement = statement->base.next) {
2424                 //context2firm(&statement->context);
2425
2426                 if(statement->base.next == NULL
2427                                 && statement->type == STATEMENT_EXPRESSION) {
2428                         result = expression_statement_to_firm(
2429                                         (expression_statement_t*) statement);
2430                         break;
2431                 }
2432                 statement_to_firm(statement);
2433         }
2434
2435         return result;
2436 }
2437
2438 static void create_local_declaration(declaration_t *declaration)
2439 {
2440         type_t *type = skip_typeref(declaration->type);
2441
2442         switch ((storage_class_tag_t) declaration->storage_class) {
2443         case STORAGE_CLASS_STATIC:
2444                 create_local_static_variable(declaration);
2445                 return;
2446         case STORAGE_CLASS_ENUM_ENTRY:
2447                 panic("enum entry declaration in local block found");
2448         case STORAGE_CLASS_EXTERN:
2449                 panic("extern declaration in local block found");
2450         case STORAGE_CLASS_NONE:
2451         case STORAGE_CLASS_AUTO:
2452         case STORAGE_CLASS_REGISTER:
2453                 if(is_type_function(type)) {
2454                         panic("nested functions not supported yet");
2455                 } else {
2456                         create_local_variable(declaration);
2457                 }
2458                 return;
2459         case STORAGE_CLASS_TYPEDEF:
2460         case STORAGE_CLASS_THREAD:
2461         case STORAGE_CLASS_THREAD_EXTERN:
2462         case STORAGE_CLASS_THREAD_STATIC:
2463                 return;
2464         }
2465         panic("invalid storage class found");
2466 }
2467
2468 static void declaration_statement_to_firm(declaration_statement_t *statement)
2469 {
2470         declaration_t *declaration = statement->declarations_begin;
2471         declaration_t *end         = statement->declarations_end->next;
2472         for( ; declaration != end; declaration = declaration->next) {
2473                 create_local_variable(declaration);
2474         }
2475 }
2476
2477 static void if_statement_to_firm(if_statement_t *statement)
2478 {
2479         ir_node *cur_block = get_cur_block();
2480
2481         ir_node *fallthrough_block = new_immBlock();
2482
2483         /* the true (blocks) */
2484         ir_node *true_block;
2485         if (statement->true_statement != NULL) {
2486                 true_block = new_immBlock();
2487                 statement_to_firm(statement->true_statement);
2488                 if(get_cur_block() != NULL) {
2489                         ir_node *jmp = new_Jmp();
2490                         add_immBlock_pred(fallthrough_block, jmp);
2491                 }
2492         } else {
2493                 true_block = fallthrough_block;
2494         }
2495
2496         /* the false (blocks) */
2497         ir_node *false_block;
2498         if(statement->false_statement != NULL) {
2499                 false_block = new_immBlock();
2500
2501                 statement_to_firm(statement->false_statement);
2502                 if(get_cur_block() != NULL) {
2503                         ir_node *jmp = new_Jmp();
2504                         add_immBlock_pred(fallthrough_block, jmp);
2505                 }
2506         } else {
2507                 false_block = fallthrough_block;
2508         }
2509
2510         /* create the condition */
2511         if(cur_block != NULL) {
2512                 set_cur_block(cur_block);
2513                 create_condition_evaluation(statement->condition, true_block,
2514                                             false_block);
2515         }
2516
2517         mature_immBlock(true_block);
2518         if(false_block != fallthrough_block) {
2519                 mature_immBlock(false_block);
2520         }
2521         mature_immBlock(fallthrough_block);
2522
2523         set_cur_block(fallthrough_block);
2524 }
2525
2526 static void while_statement_to_firm(while_statement_t *statement)
2527 {
2528         ir_node *jmp = NULL;
2529         if(get_cur_block() != NULL) {
2530                 jmp = new_Jmp();
2531         }
2532
2533         /* create the header block */
2534         ir_node *header_block = new_immBlock();
2535         if(jmp != NULL) {
2536                 add_immBlock_pred(header_block, jmp);
2537         }
2538
2539         /* the false block */
2540         ir_node *false_block = new_immBlock();
2541
2542         /* the loop body */
2543         ir_node *body_block;
2544         if (statement->body != NULL) {
2545                 ir_node *old_continue_label = continue_label;
2546                 ir_node *old_break_label    = break_label;
2547                 continue_label              = header_block;
2548                 break_label                 = false_block;
2549
2550                 body_block = new_immBlock();
2551                 statement_to_firm(statement->body);
2552
2553                 assert(continue_label == header_block);
2554                 assert(break_label    == false_block);
2555                 continue_label = old_continue_label;
2556                 break_label    = old_break_label;
2557
2558                 if(get_cur_block() != NULL) {
2559                         jmp = new_Jmp();
2560                         add_immBlock_pred(header_block, jmp);
2561                 }
2562         } else {
2563                 body_block = header_block;
2564         }
2565
2566         /* create the condition */
2567         set_cur_block(header_block);
2568
2569         create_condition_evaluation(statement->condition, body_block, false_block);
2570         mature_immBlock(body_block);
2571         mature_immBlock(false_block);
2572         mature_immBlock(header_block);
2573
2574         set_cur_block(false_block);
2575 }
2576
2577 static void do_while_statement_to_firm(do_while_statement_t *statement)
2578 {
2579         ir_node *jmp = NULL;
2580         if(get_cur_block() != NULL) {
2581                 jmp = new_Jmp();
2582         }
2583
2584         /* create the header block */
2585         ir_node *header_block = new_immBlock();
2586
2587         /* the false block */
2588         ir_node *false_block = new_immBlock();
2589
2590         /* the loop body */
2591         ir_node *body_block = new_immBlock();
2592         if(jmp != NULL) {
2593                 add_immBlock_pred(body_block, jmp);
2594         }
2595
2596         if (statement->body != NULL) {
2597                 ir_node *old_continue_label = continue_label;
2598                 ir_node *old_break_label    = break_label;
2599                 continue_label              = header_block;
2600                 break_label                 = false_block;
2601
2602                 statement_to_firm(statement->body);
2603
2604                 assert(continue_label == header_block);
2605                 assert(break_label    == false_block);
2606                 continue_label = old_continue_label;
2607                 break_label    = old_break_label;
2608
2609                 if (get_cur_block() == NULL) {
2610                         mature_immBlock(header_block);
2611                         mature_immBlock(body_block);
2612                         mature_immBlock(false_block);
2613                         return;
2614                 }
2615         }
2616
2617         ir_node *body_jmp = new_Jmp();
2618         add_immBlock_pred(header_block, body_jmp);
2619         mature_immBlock(header_block);
2620
2621         /* create the condition */
2622         set_cur_block(header_block);
2623
2624         create_condition_evaluation(statement->condition, body_block, false_block);
2625         mature_immBlock(body_block);
2626         mature_immBlock(false_block);
2627         mature_immBlock(header_block);
2628
2629         set_cur_block(false_block);
2630 }
2631
2632 static void for_statement_to_firm(for_statement_t *statement)
2633 {
2634         ir_node *jmp = NULL;
2635         if (get_cur_block() != NULL) {
2636                 if(statement->initialisation != NULL) {
2637                         expression_to_firm(statement->initialisation);
2638                 }
2639
2640                 /* create declarations */
2641                 declaration_t *declaration = statement->context.declarations;
2642                 for( ; declaration != NULL; declaration = declaration->next) {
2643                         create_local_declaration(declaration);
2644                 }
2645
2646                 jmp = new_Jmp();
2647         }
2648
2649
2650         /* create the step block */
2651         ir_node *const step_block = new_immBlock();
2652         if (statement->step != NULL) {
2653                 expression_to_firm(statement->step);
2654         }
2655         ir_node *const step_jmp = new_Jmp();
2656
2657         /* create the header block */
2658         ir_node *const header_block = new_immBlock();
2659         if (jmp != NULL) {
2660                 add_immBlock_pred(header_block, jmp);
2661         }
2662         add_immBlock_pred(header_block, step_jmp);
2663
2664         /* the false block */
2665         ir_node *const false_block = new_immBlock();
2666
2667         /* the loop body */
2668         ir_node * body_block;
2669         if (statement->body != NULL) {
2670                 ir_node *const old_continue_label = continue_label;
2671                 ir_node *const old_break_label    = break_label;
2672                 continue_label = step_block;
2673                 break_label    = false_block;
2674
2675                 body_block = new_immBlock();
2676                 statement_to_firm(statement->body);
2677
2678                 assert(continue_label == step_block);
2679                 assert(break_label    == false_block);
2680                 continue_label = old_continue_label;
2681                 break_label    = old_break_label;
2682
2683                 if (get_cur_block() != NULL) {
2684                         jmp = new_Jmp();
2685                         add_immBlock_pred(step_block, jmp);
2686                 }
2687         } else {
2688                 body_block = step_block;
2689         }
2690
2691         /* create the condition */
2692         set_cur_block(header_block);
2693         if (statement->condition != NULL) {
2694                 create_condition_evaluation(statement->condition, body_block,
2695                                             false_block);
2696         } else {
2697                 keep_alive(header_block);
2698                 jmp = new_Jmp();
2699                 add_immBlock_pred(body_block, jmp);
2700         }
2701
2702         mature_immBlock(body_block);
2703         mature_immBlock(false_block);
2704         mature_immBlock(step_block);
2705         mature_immBlock(header_block);
2706         mature_immBlock(false_block);
2707
2708         set_cur_block(false_block);
2709 }
2710
2711 static void create_jump_statement(const statement_t *statement,
2712                                   ir_node *target_block)
2713 {
2714         if(get_cur_block() == NULL)
2715                 return;
2716
2717         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
2718         ir_node  *jump = new_d_Jmp(dbgi);
2719         add_immBlock_pred(target_block, jump);
2720
2721         set_cur_block(NULL);
2722 }
2723
2724 static void switch_statement_to_firm(const switch_statement_t *statement)
2725 {
2726         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
2727
2728         ir_node *expression  = expression_to_firm(statement->expression);
2729         ir_node *cond        = new_d_Cond(dbgi, expression);
2730         ir_node *break_block = new_immBlock();
2731
2732         set_cur_block(NULL);
2733
2734         ir_node *const old_switch_cond       = current_switch_cond;
2735         ir_node *const old_break_label       = break_label;
2736         const bool     old_saw_default_label = saw_default_label;
2737         current_switch_cond                  = cond;
2738         break_label                          = break_block;
2739
2740         statement_to_firm(statement->body);
2741
2742         if(get_cur_block() != NULL) {
2743                 ir_node *jmp = new_Jmp();
2744                 add_immBlock_pred(break_block, jmp);
2745         }
2746
2747         if (!saw_default_label) {
2748                 set_cur_block(get_nodes_block(cond));
2749                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
2750                                                         MAGIC_DEFAULT_PN_NUMBER);
2751                 add_immBlock_pred(break_block, proj);
2752         }
2753
2754         assert(current_switch_cond == cond);
2755         assert(break_label         == break_block);
2756         current_switch_cond = old_switch_cond;
2757         break_label         = old_break_label;
2758         saw_default_label   = old_saw_default_label;
2759
2760         mature_immBlock(break_block);
2761         set_cur_block(break_block);
2762 }
2763
2764 static void case_label_to_firm(const case_label_statement_t *statement)
2765 {
2766         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
2767
2768         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
2769
2770         /* let's create a node and hope firm constant folding creates a Const
2771          * node... */
2772         ir_node *proj;
2773         set_cur_block(get_nodes_block(current_switch_cond));
2774         if(statement->expression) {
2775                 long pn = fold_constant(statement->expression);
2776                 if(pn == MAGIC_DEFAULT_PN_NUMBER) {
2777                         /* oops someone detected our cheating... */
2778                         panic("magic default pn used");
2779                 }
2780                 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
2781         } else {
2782                 saw_default_label = true;
2783                 proj = new_d_defaultProj(dbgi, current_switch_cond,
2784                                          MAGIC_DEFAULT_PN_NUMBER);
2785         }
2786
2787         ir_node *block = new_immBlock();
2788         if (fallthrough != NULL) {
2789                 add_immBlock_pred(block, fallthrough);
2790         }
2791         add_immBlock_pred(block, proj);
2792         mature_immBlock(block);
2793
2794         statement_to_firm(statement->label_statement);
2795 }
2796
2797 static ir_node *get_label_block(declaration_t *label)
2798 {
2799         assert(label->namespc == NAMESPACE_LABEL);
2800
2801         if(label->declaration_type == DECLARATION_TYPE_LABEL_BLOCK) {
2802                 return label->v.block;
2803         }
2804         assert(label->declaration_type == DECLARATION_TYPE_UNKNOWN);
2805
2806         ir_node *old_cur_block = get_cur_block();
2807         ir_node *block         = new_immBlock();
2808         set_cur_block(old_cur_block);
2809
2810         label->declaration_type = DECLARATION_TYPE_LABEL_BLOCK;
2811         label->v.block          = block;
2812
2813         ARR_APP1(ir_node *, imature_blocks, block);
2814
2815         return block;
2816 }
2817
2818 static void label_to_firm(const label_statement_t *statement)
2819 {
2820         ir_node *block = get_label_block(statement->label);
2821
2822         if(get_cur_block() != NULL) {
2823                 ir_node *jmp = new_Jmp();
2824                 add_immBlock_pred(block, jmp);
2825         }
2826
2827         set_cur_block(block);
2828         keep_alive(block);
2829
2830         statement_to_firm(statement->label_statement);
2831 }
2832
2833 static void goto_to_firm(const goto_statement_t *statement)
2834 {
2835         if(get_cur_block() == NULL)
2836                 return;
2837
2838         ir_node *block = get_label_block(statement->label);
2839         ir_node *jmp   = new_Jmp();
2840         add_immBlock_pred(block, jmp);
2841
2842         set_cur_block(NULL);
2843 }
2844
2845 typedef enum modifier_t {
2846         ASM_MODIFIER_WRITE_ONLY   = 1 << 0,
2847         ASM_MODIFIER_READ_WRITE   = 1 << 1,
2848         ASM_MODIFIER_COMMUTATIVE  = 1 << 2,
2849         ASM_MODIFIER_EARLYCLOBBER = 1 << 3,
2850 } modifier_t;
2851
2852 #if 0
2853 static void asm_statement_to_firm(const asm_statement_t *statement)
2854 {
2855         bool needs_memory = false;
2856
2857         size_t         n_clobbers = 0;
2858         asm_clobber_t *clobber    = statement->clobbers;
2859         for( ; clobber != NULL; clobber = clobber->next) {
2860                 if(strcmp(clobber->clobber, "memory") == 0) {
2861                         needs_memory = true;
2862                         continue;
2863                 }
2864
2865                 ident *id = new_id_from_str(clobber->clobber);
2866                 obstack_ptr_grow(&asm_obst, id);
2867                 ++n_clobbers;
2868         }
2869         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
2870         ident **clobbers = NULL;
2871         if(n_clobbers > 0) {
2872                 clobbers = obstack_finish(&asm_obst);
2873         }
2874
2875         /* find and count input and output constraints */
2876         asm_constraint_t *constraint = statement->inputs;
2877         for( ; constraint != NULL; constraint = constraint->next) {
2878                 int  modifiers      = 0;
2879                 bool supports_memop = false;
2880                 for(const char *c = constraint->constraints; *c != 0; ++c) {
2881                         /* TODO: improve error messages */
2882                         switch(*c) {
2883                         case '?':
2884                         case '!':
2885                                 panic("multiple alternative assembler constraints not "
2886                                       "supported");
2887                         case 'm':
2888                         case 'o':
2889                         case 'V':
2890                         case '<':
2891                         case '>':
2892                         case 'X':
2893                                 supports_memop = true;
2894                                 obstack_1grow(&asm_obst, *c);
2895                                 break;
2896                         case '=':
2897                                 if(modifiers & ASM_MODIFIER_READ_WRITE)
2898                                         panic("inconsistent register constraints");
2899                                 modifiers |= ASM_MODIFIER_WRITE_ONLY;
2900                                 break;
2901                         case '+':
2902                                 if(modifiers & ASM_MODIFIER_WRITE_ONLY)
2903                                         panic("inconsistent register constraints");
2904                                 modifiers |= ASM_MODIFIER_READ_WRITE;
2905                                 break;
2906                         case '&':
2907                                 modifiers |= ASM_MODIFIER_EARLYCLOBBER;
2908                                 panic("early clobber assembler constraint not supported yet");
2909                                 break;
2910                         case '%':
2911                                 modifiers |= ASM_MODIFIER_COMMUTATIVE;
2912                                 panic("commutative assembler constraint not supported yet");
2913                                 break;
2914                         case '#':
2915                                 /* skip register preferences stuff... */
2916                                 while(*c != 0 && *c != ',')
2917                                         ++c;
2918                                 break;
2919                         case '*':
2920                                 /* skip register preferences stuff... */
2921                                 ++c;
2922                                 break;
2923                         default:
2924                                 obstack_1grow(&asm_obst, *c);
2925                                 break;
2926                         }
2927                 }
2928                 obstack_1grow(&asm_obst, '\0');
2929                 const char *constraint_string = obstack_finish(&asm_obst);
2930
2931                 needs_memory |= supports_memop;
2932                 if(supports_memop) {
2933
2934                 }
2935         }
2936
2937 }
2938 #endif
2939
2940 static void statement_to_firm(statement_t *statement)
2941 {
2942         switch(statement->type) {
2943         case STATEMENT_INVALID:
2944                 panic("invalid statement found");
2945         case STATEMENT_COMPOUND:
2946                 compound_statement_to_firm(&statement->compound);
2947                 return;
2948         case STATEMENT_RETURN:
2949                 return_statement_to_firm(&statement->returns);
2950                 return;
2951         case STATEMENT_EXPRESSION:
2952                 expression_statement_to_firm(&statement->expression);
2953                 return;
2954         case STATEMENT_IF:
2955                 if_statement_to_firm(&statement->ifs);
2956                 return;
2957         case STATEMENT_WHILE:
2958                 while_statement_to_firm(&statement->whiles);
2959                 return;
2960         case STATEMENT_DO_WHILE:
2961                 do_while_statement_to_firm(&statement->do_while);
2962                 return;
2963         case STATEMENT_DECLARATION:
2964                 declaration_statement_to_firm(&statement->declaration);
2965                 return;
2966         case STATEMENT_BREAK:
2967                 create_jump_statement(statement, break_label);
2968                 return;
2969         case STATEMENT_CONTINUE:
2970                 create_jump_statement(statement, continue_label);
2971                 return;
2972         case STATEMENT_SWITCH:
2973                 switch_statement_to_firm(&statement->switchs);
2974                 return;
2975         case STATEMENT_CASE_LABEL:
2976                 case_label_to_firm(&statement->case_label);
2977                 return;
2978         case STATEMENT_FOR:
2979                 for_statement_to_firm(&statement->fors);
2980                 return;
2981         case STATEMENT_LABEL:
2982                 label_to_firm(&statement->label);
2983                 return;
2984         case STATEMENT_GOTO:
2985                 goto_to_firm(&statement->gotos);
2986                 return;
2987         case STATEMENT_ASM:
2988                 //asm_statement_to_firm(&statement->asms);
2989                 //return;
2990                 break;
2991         }
2992         panic("Statement not implemented\n");
2993 }
2994
2995 static int count_local_declarations(const declaration_t *      decl,
2996                                     const declaration_t *const end)
2997 {
2998         int count = 0;
2999         for (; decl != end; decl = decl->next) {
3000                 const type_t *type = skip_typeref(decl->type);
3001                 switch (type->type) {
3002                         case TYPE_ATOMIC:
3003                         case TYPE_ENUM:
3004                         case TYPE_POINTER:
3005                                 if (!decl->address_taken)
3006                                         ++count;
3007                                 break;
3008
3009                         default: break;
3010                 }
3011         }
3012         return count;
3013 }
3014
3015 static int count_decls_in_stmts(const statement_t *stmt)
3016 {
3017         int count = 0;
3018         for (; stmt != NULL; stmt = stmt->base.next) {
3019                 switch (stmt->type) {
3020                         case STATEMENT_DECLARATION: {
3021                                 const declaration_statement_t *const decl_stmt =
3022                                         (const declaration_statement_t*)stmt;
3023                                 count += count_local_declarations(decl_stmt->declarations_begin,
3024                                                                   decl_stmt->declarations_end->next);
3025                                 break;
3026                         }
3027
3028                         case STATEMENT_COMPOUND: {
3029                                 const compound_statement_t *const comp =
3030                                         (const compound_statement_t*)stmt;
3031                                 count += count_decls_in_stmts(comp->statements);
3032                                 break;
3033                         }
3034
3035                         case STATEMENT_IF: {
3036                                 const if_statement_t *const if_stmt = (const if_statement_t*)stmt;
3037                                 count += count_decls_in_stmts(if_stmt->true_statement);
3038                                 count += count_decls_in_stmts(if_stmt->false_statement);
3039                                 break;
3040                         }
3041
3042                         case STATEMENT_SWITCH: {
3043                                 const switch_statement_t *const switch_stmt =
3044                                         (const switch_statement_t*)stmt;
3045                                 count += count_decls_in_stmts(switch_stmt->body);
3046                                 break;
3047                         }
3048
3049                         case STATEMENT_LABEL: {
3050                                 const label_statement_t *const label_stmt =
3051                                         (const label_statement_t*)stmt;
3052                                 count += count_decls_in_stmts(label_stmt->label_statement);
3053                                 break;
3054                         }
3055
3056                         case STATEMENT_WHILE: {
3057                                 const while_statement_t *const while_stmt =
3058                                         (const while_statement_t*)stmt;
3059                                 count += count_decls_in_stmts(while_stmt->body);
3060                                 break;
3061                         }
3062
3063                         case STATEMENT_DO_WHILE: {
3064                                 const do_while_statement_t *const do_while_stmt =
3065                                         (const do_while_statement_t*)stmt;
3066                                 count += count_decls_in_stmts(do_while_stmt->body);
3067                                 break;
3068                         }
3069
3070                         case STATEMENT_FOR: {
3071                                 const for_statement_t *const for_stmt =
3072                                         (const for_statement_t*)stmt;
3073                                 /* TODO initialisation */
3074                                 count += count_decls_in_stmts(for_stmt->body);
3075                                 break;
3076                         }
3077
3078                         case STATEMENT_ASM:
3079                         case STATEMENT_BREAK:
3080                         case STATEMENT_CASE_LABEL:
3081                         case STATEMENT_CONTINUE:
3082                         case STATEMENT_EXPRESSION:
3083                         case STATEMENT_GOTO:
3084                         case STATEMENT_INVALID:
3085                         case STATEMENT_RETURN:
3086                                 break;
3087                 }
3088         }
3089         return count;
3090 }
3091
3092 static int get_function_n_local_vars(declaration_t *declaration)
3093 {
3094         int count = 0;
3095
3096         /* count parameters */
3097         count += count_local_declarations(declaration->context.declarations, NULL);
3098
3099         /* count local variables declared in body */
3100         count += count_decls_in_stmts(declaration->init.statement);
3101
3102         /* TODO FIXME: Matze: I'm lazy don't want to scan all expressions
3103          * for expression statements... */
3104         count += 10;
3105
3106         return count;
3107 }
3108
3109 static void initialize_function_parameters(declaration_t *declaration)
3110 {
3111         ir_graph        *irg             = current_ir_graph;
3112         ir_node         *args            = get_irg_args(irg);
3113         ir_node         *start_block     = get_irg_start_block(irg);
3114         ir_type         *function_irtype = get_ir_type(declaration->type);
3115
3116         int            n         = 0;
3117         declaration_t *parameter = declaration->context.declarations;
3118         for( ; parameter != NULL; parameter = parameter->next, ++n) {
3119                 assert(parameter->declaration_type == DECLARATION_TYPE_UNKNOWN);
3120                 type_t *type = skip_typeref(parameter->type);
3121
3122                 bool needs_entity = parameter->address_taken;
3123                 assert(!is_type_array(type));
3124                 if(is_type_compound(type)) {
3125                         needs_entity = true;
3126                 }
3127
3128                 if(needs_entity) {
3129                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
3130                         ident     *id     = new_id_from_str(parameter->symbol->string);
3131                         set_entity_ident(entity, id);
3132
3133                         parameter->declaration_type
3134                                 = DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY;
3135                         parameter->v.entity = entity;
3136                         continue;
3137                 }
3138
3139                 ir_mode *mode = get_ir_mode(parameter->type);
3140                 long     pn   = n;
3141                 ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn);
3142
3143                 parameter->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
3144                 parameter->v.value_number   = next_value_number_function;
3145                 ++next_value_number_function;
3146
3147                 set_value(parameter->v.value_number, proj);
3148         }
3149 }
3150
3151 static void create_function(declaration_t *declaration)
3152 {
3153         ir_entity *function_entity = get_function_entity(declaration);
3154
3155         if(declaration->init.statement == NULL)
3156                 return;
3157
3158         current_function_decl = declaration;
3159         current_function_name = NULL;
3160
3161         assert(imature_blocks == NULL);
3162         imature_blocks = NEW_ARR_F(ir_node*, 0);
3163
3164         int       n_local_vars = get_function_n_local_vars(declaration);
3165         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
3166         ir_node  *first_block  = get_cur_block();
3167
3168         next_value_number_function = 0;
3169         initialize_function_parameters(declaration);
3170
3171         statement_to_firm(declaration->init.statement);
3172
3173         ir_node *end_block = get_irg_end_block(irg);
3174
3175         /* do we have a return statement yet? */
3176         if(get_cur_block() != NULL) {
3177                 type_t *type = skip_typeref(declaration->type);
3178                 assert(is_type_function(type));
3179                 const function_type_t *func_type   = &type->function;
3180                 const type_t          *return_type
3181                         = skip_typeref(func_type->return_type);
3182
3183                 ir_node *ret;
3184                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
3185                         ret = new_Return(get_store(), 0, NULL);
3186                 } else {
3187                         ir_mode *mode;
3188                         if(is_type_scalar(return_type)) {
3189                                 mode = get_ir_mode(func_type->return_type);
3190                         } else {
3191                                 mode = mode_P_data;
3192                         }
3193
3194                         ir_node *in[1];
3195                         // §5.1.2.2.3 main implicitly returns 0
3196                         if (strcmp(declaration->symbol->string, "main") == 0) {
3197                                 in[0] = new_Const(mode, get_mode_null(mode));
3198                         } else {
3199                                 in[0] = new_Unknown(mode);
3200                         }
3201                         ret = new_Return(get_store(), 1, in);
3202                 }
3203                 add_immBlock_pred(end_block, ret);
3204         }
3205
3206         for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
3207                 mature_immBlock(imature_blocks[i]);
3208         }
3209         DEL_ARR_F(imature_blocks);
3210         imature_blocks = NULL;
3211
3212         mature_immBlock(first_block);
3213         mature_immBlock(end_block);
3214
3215         irg_finalize_cons(irg);
3216
3217         /* finalize the frame type */
3218         ir_type *frame_type = get_irg_frame_type(irg);
3219         int      n          = get_compound_n_members(frame_type);
3220         int      align_all  = 4;
3221         int      offset     = 0;
3222         for(int i = 0; i < n; ++i) {
3223                 ir_entity *entity      = get_compound_member(frame_type, i);
3224                 ir_type   *entity_type = get_entity_type(entity);
3225
3226                 int align = get_type_alignment_bytes(entity_type);
3227                 if(align > align_all)
3228                         align_all = align;
3229                 int misalign = 0;
3230                 if(align > 0) {
3231                         misalign  = offset % align;
3232                         if(misalign > 0) {
3233                                 offset += align - misalign;
3234                         }
3235                 }
3236
3237                 set_entity_offset(entity, offset);
3238                 offset += get_type_size_bytes(entity_type);
3239         }
3240         set_type_size_bytes(frame_type, offset);
3241         set_type_alignment_bytes(frame_type, align_all);
3242         set_type_state(frame_type, layout_fixed);
3243
3244         irg_vrfy(irg);
3245 }
3246
3247 static void create_global_variable(declaration_t *declaration)
3248 {
3249         ir_visibility  vis;
3250         ir_type       *var_type;
3251         switch ((storage_class_tag_t)declaration->storage_class) {
3252                 case STORAGE_CLASS_STATIC:
3253                         vis = visibility_local;
3254                         goto global_var;
3255
3256                 case STORAGE_CLASS_EXTERN:
3257                         vis = visibility_external_allocated;
3258                         goto global_var;
3259
3260                 case STORAGE_CLASS_NONE:
3261                         vis = visibility_external_visible;
3262                         goto global_var;
3263
3264                 case STORAGE_CLASS_THREAD:
3265                         vis = visibility_external_visible;
3266                         goto tls_var;
3267
3268                 case STORAGE_CLASS_THREAD_EXTERN:
3269                         vis = visibility_external_allocated;
3270                         goto tls_var;
3271
3272                 case STORAGE_CLASS_THREAD_STATIC:
3273                         vis = visibility_local;
3274                         goto tls_var;
3275
3276 tls_var:
3277                         var_type = get_tls_type();
3278                         goto create_var;
3279
3280 global_var:
3281                         var_type = get_glob_type();
3282                         goto create_var;
3283
3284 create_var:
3285                         create_declaration_entity(declaration, DECLARATION_TYPE_GLOBAL_VARIABLE,
3286                                                   var_type);
3287                         set_entity_visibility(declaration->v.entity, vis);
3288
3289                         current_ir_graph = get_const_code_irg();
3290                         create_initializer(declaration);
3291                         return;
3292
3293                 case STORAGE_CLASS_TYPEDEF:
3294                 case STORAGE_CLASS_AUTO:
3295                 case STORAGE_CLASS_REGISTER:
3296                 case STORAGE_CLASS_ENUM_ENTRY:
3297                         break;
3298         }
3299         panic("Invalid storage class for global variable");
3300 }
3301
3302 static void context_to_firm(context_t *context)
3303 {
3304         /* first pass: create declarations */
3305         declaration_t *declaration = context->declarations;
3306         for( ; declaration != NULL; declaration = declaration->next) {
3307                 if(declaration->namespc != NAMESPACE_NORMAL)
3308                         continue;
3309                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
3310                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
3311                         continue;
3312                 if(declaration->symbol == NULL)
3313                         continue;
3314
3315                 type_t *type = skip_typeref(declaration->type);
3316                 if(is_type_function(type)) {
3317                         get_function_entity(declaration);
3318                 } else {
3319                         create_global_variable(declaration);
3320                 }
3321         }
3322
3323         /* second pass: create code */
3324         declaration = context->declarations;
3325         for( ; declaration != NULL; declaration = declaration->next) {
3326                 if(declaration->namespc != NAMESPACE_NORMAL)
3327                         continue;
3328                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
3329                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
3330                         continue;
3331                 if(declaration->symbol == NULL)
3332                         continue;
3333
3334                 type_t *type = declaration->type;
3335                 if(type->type != TYPE_FUNCTION)
3336                         continue;
3337
3338                 create_function(declaration);
3339         }
3340 }
3341
3342 void translation_unit_to_firm(translation_unit_t *unit)
3343 {
3344         type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
3345         type_void       = make_atomic_type(ATOMIC_TYPE_VOID, TYPE_QUALIFIER_NONE);
3346         type_int        = make_atomic_type(ATOMIC_TYPE_INT,  TYPE_QUALIFIER_NONE);
3347
3348         ir_type_int        = get_ir_type(type_int);
3349         ir_type_const_char = get_ir_type(type_const_char);
3350         ir_type_wchar_t    = get_ir_type(type_wchar_t);
3351         ir_type_void       = get_ir_type(type_int); /* we don't have a real void
3352                                                        type in firm */
3353
3354         type_void->base.firm_type = ir_type_void;
3355
3356         /* just to be sure */
3357         continue_label      = NULL;
3358         break_label         = NULL;
3359         current_switch_cond = NULL;
3360
3361         context_to_firm(& unit->context);
3362 }